Rethink about using godot, because godot python only available at 3.2

[rithgroove]

Godot Python is only available for 3.2. While the current version are 4.0 and 3.5.1 which leads to more problem once it got upgraded. :/

• [ ] update wiki and documentation

[rithgroove]

I think we're going to use pygame. Hopefully it'll be easier, since we don't do crazy rendering etc. only sprites.