Hello WWWWWWorld!

.github/pull_request_template.md

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+## The Basics
+
+Thanks for making a pull request! Before making a pull request, we have some
+things for you to read through first:
+
+- We generally do not accept patches for formatting fixes, unless the formatting
+  fixes are part of a functional patch (for example, when fixing a bug in a
+  function you can fix up the lines surrounding it if needed).
+- Patches that break compatibility with the original game data or save data will
+  not be accepted.
+- New features and user interface changes will most likely not be accepted
+  unless they are for improving user accessibility.
+- New platforms are acceptable if they use SDL + PhysicsFS and don't mess with
+  the game source too much.
+    - (No homebrew console targets, sorry! Maybe do the work in SDL instead?)
+- Pull requests that do not fill out the Legal Stuff will be closed
+  automatically.
+
+If you understand these notes, you can delete the text in this section. Pull
+requests that still have this text will be closed automatically.
+
+## Legal Stuff:
+
+By submitting this pull request, I confirm that...
+
+- [ ] My changes may be used in a future commercial release of VVVVVV (for
+  example, a 2.3 update on Steam for Windows/macOS/Linux)
+- [ ] I will be credited in a `CONTRIBUTORS` file for all of said releases, but
+  will NOT be compensated for these changes
+
+## Changes:
+
+Describe your patch here!

LICENSE.md

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+VVVVVV Source Code License v1.0
+-------
+Last updated on January 7th, 2020.
+
+This repo contains the source code for VVVVVV, including all level content and text from the game. It does not, however, contain any of the icons, art, graphics or music for the game, which are still under a proprietary license. For personal use, you can find these assets for free in the [Make and Play Edition](http://distractionware.com/blog/category/vvvvvv-make-and-play/).
+
+If you are interested in distributing work that falls outside the terms in the licence below, or if you are interested in distributing work that includes using any part of VVVVVV not included in this repo then please get in touch - we can discuss granting a licence for that on a case by case basis. The purpose of making the contents of this repo available is for others to learn from, to inspire new work, and to allow the creation of new tools and modifications for VVVVVV.
+
+This software available from here is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any claim, damages or other liability arising from the use or in connection with this software. All materials in the repo are copyright of Terry Cavanagh © 2010-2020.
+
+Permission is granted to anyone to use this software and to alter it and redistribute it freely, subject to the following restrictions:
+
+ - You may not alter or redistribute this software in any manner that is primarily intended for or directed toward commercial advantage or private monetary compensation. This includes, but is not limited to, selling altered or unaltered versions of this software, or including advertisements of any kind in altered or unaltered versions of this software.
+ - The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, you are required to include an acknowledgement in the product that this software is the copyright of Terry Cavanagh and is based on the VVVVVV source code.
+ - Altered source/binary versions must be plainly marked as such, and must not be misrepresented as being the original software.
+ - You must not distribute any materials from the game which are not included in this repo unless approved by us in writing. 
+ - This notice may not be removed or altered from any source/binary distribution.

README.md

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+This is the source code to VVVVVV, version 2.0+.
+
+License
+-------
+VVVVVV's source code is made available under a custom license. See [LICENSE.md](LICENSE.md) for more details.
+
+In general, if you're interested in creating something that falls outside the license terms, get in touch with Terry and we'll talk about it!
+
+Authors
+-------
+- Created by [Terry Cavanagh](http://distractionware.com/)
+- Room Names by [Bennett Foddy](http://www.foddy.net)
+- Music by [Magnus Pålsson](http://souleye.madtracker.net/)
+- Metal Soundtrack by [FamilyJules](http://familyjules7x.com/)
+- 2.0 Update (C++ Port) by [Simon Roth](http://www.machinestudios.co.uk)
+- 2.2 Update (SDL2/PhysicsFS/Steamworks port) by [Ethan Lee](http://www.flibitijibibo.com/)
+- Beta Testing by Sam Kaplan and Pauli Kohberger
+- Ending Picture by Pauli Kohberger
+
+Versions
+------------
+There are two versions of the VVVVVV source code available - the [desktop version](https://github.com/TerryCavanagh/VVVVVV/tree/master/desktop_version) (based on the C++ port, and currently live on Steam), and the [mobile version](https://github.com/TerryCavanagh/VVVVVV/tree/master/mobile_version) (based on a fork of the original flash source code, and currently live on iOS and Android).

desktop_version/CMakeLists.txt

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+# CMake File for VVVVVV
+# Written by Ethan "flibitijibibo" Lee
+
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)
+PROJECT(VVVVVV)
+
+# Architecture Flags
+IF(APPLE)
+	# Wow, Apple is a huge jerk these days huh?
+	SET(CMAKE_OSX_SYSROOT /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk)
+	SET(CMAKE_OSX_DEPLOYMENT_TARGET 10.9)
+	LINK_DIRECTORIES(/usr/local/lib)
+ENDIF()
+
+# Compiler Flags
+ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_DEFAULT=0 -DPHYSFS_SUPPORTS_ZIP=1)
+
+# Executable Suffix
+IF(APPLE)
+	SET(CMAKE_EXECUTABLE_SUFFIX ".osx")
+ELSEIF(WIN32)
+	# Nothing!
+ELSEIF(CMAKE_SIZEOF_VOID_P MATCHES "8")
+	SET(CMAKE_EXECUTABLE_SUFFIX ".x86_64")
+ELSE()
+	SET(CMAKE_EXECUTABLE_SUFFIX ".x86")
+ENDIF()
+
+# Include Directories
+INCLUDE_DIRECTORIES(src tinyxml physfs lodepng)
+
+# Source Lists
+SET(VVV_SRC
+	src/BinaryBlob.cpp
+	src/BlockV.cpp
+	src/editor.cpp
+	src/Ent.cpp
+	src/Entity.cpp
+	src/FileSystemUtils.cpp
+	src/Finalclass.cpp
+	src/Game.cpp
+	src/Graphics.cpp
+	src/GraphicsResources.cpp
+	src/GraphicsUtil.cpp
+	src/Input.cpp
+	src/KeyPoll.cpp
+	src/Labclass.cpp
+	src/Logic.cpp
+	src/Map.cpp
+	src/Music.cpp
+	src/Otherlevel.cpp
+	src/preloader.cpp
+	src/Screen.cpp
+	src/Script.cpp
+	src/Scripts.cpp
+	src/SoundSystem.cpp
+	src/Spacestation2.cpp
+	src/TerminalScripts.cpp
+	src/Textbox.cpp
+	src/titlerender.cpp
+	src/Tower.cpp
+	src/UtilityClass.cpp
+	src/WarpClass.cpp
+	src/main.cpp
+	src/SteamNetwork.c
+)
+SET(XML_SRC
+	tinyxml/tinystr.cpp
+	tinyxml/tinyxml.cpp
+	tinyxml/tinyxmlerror.cpp
+	tinyxml/tinyxmlparser.cpp
+)
+SET(PFS_SRC
+	physfs/physfs.c
+	physfs/physfs_archiver_dir.c
+	physfs/physfs_archiver_unpacked.c
+	physfs/physfs_archiver_zip.c
+	physfs/physfs_byteorder.c
+	physfs/physfs_unicode.c
+	physfs/physfs_platform_posix.c
+	physfs/physfs_platform_unix.c
+	physfs/physfs_platform_windows.c
+)
+IF(APPLE)
+	# Are you noticing a pattern with this Apple crap yet?
+	SET(PFS_SRC ${PFS_SRC} physfs/physfs_platform_apple.m)
+ENDIF()
+SET(PNG_SRC lodepng/lodepng.c)
+
+# Executable information
+IF(WIN32)
+	ADD_EXECUTABLE(vvvvvv WIN32 ${VVV_SRC})
+ELSE()
+	ADD_EXECUTABLE(vvvvvv ${VVV_SRC})
+ENDIF()
+
+# Library information
+ADD_LIBRARY(tinyxml-static STATIC ${XML_SRC})
+ADD_LIBRARY(physfs-static STATIC ${PFS_SRC} ${PFSP_SRC})
+ADD_LIBRARY(lodepng-static STATIC ${PNG_SRC})
+
+# Static Dependencies
+TARGET_LINK_LIBRARIES(vvvvvv physfs-static tinyxml-static lodepng-static)
+
+# SDL2 Dependency (Detection pulled from FAudio)
+if (DEFINED SDL2_INCLUDE_DIRS AND DEFINED SDL2_LIBRARIES)
+	message(STATUS "Using pre-defined SDL2 variables SDL2_INCLUDE_DIRS and SDL2_LIBRARIES")
+	target_include_directories(vvvvvv PUBLIC "$<BUILD_INTERFACE:${SDL2_INCLUDE_DIRS}>")
+	target_link_libraries(vvvvvv ${SDL2_LIBRARIES})
+else()
+	# Only try to autodetect if both SDL2 variables aren't explicitly set
+	find_package(SDL2 CONFIG)
+	if (TARGET SDL2::SDL2)
+		message(STATUS "Using TARGET SDL2::SDL2")
+		target_link_libraries(vvvvvv SDL2::SDL2 SDL2_mixer)
+	elseif (TARGET SDL2)
+		message(STATUS "Using TARGET SDL2")
+		target_link_libraries(vvvvvv SDL2 SDL2_mixer)
+	else()
+		message(STATUS "No TARGET SDL2::SDL2, or SDL2, using variables")
+		target_include_directories(vvvvvv PUBLIC "$<BUILD_INTERFACE:${SDL2_INCLUDE_DIRS}>")
+		target_link_libraries(vvvvvv ${SDL2_LIBRARIES} SDL2_mixer)
+	endif()
+endif()
+
+# Yes, more Apple Crap
+IF(APPLE)
+	FIND_LIBRARY(FOUNDATION NAMES Foundation)
+	FIND_LIBRARY(IOKIT NAMES IOKit)
+	TARGET_LINK_LIBRARIES(vvvvvv objc ${IOKIT} ${FOUNDATION})
+ENDIF()

desktop_version/README.md

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+How to Build
+------------
+VVVVVV's official desktop versions are built with the following environments:
+
+- Windows: Visual Studio 2010
+- macOS: Xcode CLT, currently targeting 10.9 SDK
+- GNU/Linux: CentOS 7
+
+The engine depends solely on SDL2 and SDL2_mixer. All other dependencies are
+statically linked into the engine. The libs for Windows are in this repository,
+all other platforms should install them either from the OS package manager or
+from self-compiled source.
+
+Steamworks support is included and the DLL is loaded dynamically, you do not
+need the SDK headers and there is no special Steam or non-Steam version. The
+current implementation has been tested with Steamworks SDK v1.46.
+
+To generate the projects on Windows:
+```
+# Put the SDL2/SDL2_mixer VC development libraries next to the VVVVVV folder!
+mkdir flibitBuild
+cd flibitBuild
+cmake -G "Visual Studio 10 2010" .. -DSDL2_INCLUDE_DIRS="../../SDL2-2.0.10/include;../../SDL2_mixer-2.0.4/include" -DSDL2_LIBRARIES="../../SDL2-2.0.10/lib/x86/SDL2;../../SDL2-2.0.10/lib/x86/SDL2main;../../SDL2_mixer-2.0.4/lib/x86/SDL2_mixer"
+```
+
+To generate everywhere else:
+```
+mkdir flibitBuild
+cd flibitBuild
+cmake ..
+```
+
+macOS may be fussy about the SDK version. How to fix this is up to the whims of
+however Apple wants to make CMAKE_OSX_SYSROOT annoying to configure and retain
+each time Xcode updates.
+
+A Word About Compiler Quirks
+----------------------------
+
+This engine is _super_ fussy about optimization levels and runtime checks. In
+particular, the Windows version _absolutely positively must_ be compiled in
+Debug mode, with /RTC enabled. If you build in Release mode, or have /RTC
+disabled, the game behaves dramatically different in ways that were never fully
+documented (bizarre softlocks, out-of-bounds issues that don't show up in tools
+like Valgrind, stuff like that). There are lots of things about this old code
+that could be cleaned up, polished, rewritten, and so on, but this is the one
+that will probably bite you the hardest when setting up your own build,
+regardless of platform.
+
+We hope you'll enjoy messing with the source anyway!
+
+Love, flibit