New game engine update

I decided to use GDevelop as a game engine for this game. The main reason is because most of the specifications of this game actually fits better if I used GDevelop.

The game mechanics is just the same, but I decided to make this game easier by making the friction higher. In this case, Tommy will not slide too much anymore after landing on a platform. In other word, this game will be a little bit easier than before.