+[H] Worldmap needs to allow multiple maps
+ - or just one big map with multiple worlds?
+[H] Change resolution to 800x600
+ - Levels need to be updated to resolution
+ - half of the levels have been already updated
+ - some fixed levels still have "glitches". See the menu level where
+ some of the tiles are "wrong" and don't fit
+[H] Buttjump related things
+ ? Right now only breaks bricks beneath tux - what else should it break
+ - 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.
+ - Possible solution: reduce Tux's width when checking collision with tiles
+[H] stdint.h isn't a part of FreeBSD. We should probably use SDL integer
+ types instead.
+[H] Dead Tux/badguys should be drawn on top of the foreground layer
+[H] Graphics
+ - New forest tileset
+ - Badguy sprites
+ - Tux's buttjump animation
+[H] When bumping powerups, they should bounce away from the centre of Tux
+[H] Backgrounds should be square tiles instead of just tiling one image
+ - Useful for vertical scrolling when we only want a sky background on the
+ top of the level
+ - Support for this is already available using a paralax tilemap layer
+
+[M] Save score on per-level basis to make high-score
+[M] Save time on per-level basis to make low-time-score
+[M] Add bonus score for extra time left when finishing a level