player should allowed to type any word of their choices with the same initial chars.

[neizod]

example of current behavior:

1. words on board are hello, hi, goodbye, appearing in this order.
2. player start typing h.
3. game engine lock player's current word to hello and highlighting it as _h_ello.
4. player is forced to complete typing hello only, they can not type hi.

this is not so good behavior, it should be this instead:

3. game engine match every words beginning with h, so it highlight _h_ello and _h_i.
4. player have their freedom to choose to complete hello or hi.