[?] Default keyboard setup should change. Up will be needed for other features
like going through doors and looking up, etc.
+[H] Make sure there are no invalid tile numbers in the level files
+ - Tile 6 occurs in world1/level5.stl as well as other levels
[H] Change resolution to 800x600
- Levels need to be updated to resolution
(half of the levels have been already updated)
[H] Buttjump related things
? Right now only breaks bricks beneath tux - what else should it break
- - Breaks 1 box too much at the left when tux is facing left.
- Should kill enemies with a certain range
+ - Done--now needs to be tweaked
- Animation (need images)
? Should disable Tux's movement temporarily (1 second?)
[H] Tux should fall while walking in tiles that have a space between.