-[L] in the "Welcome to Antarctica" level, the blocks next to the first growup
- look like there are 2 blocks above each other when bumping against them as
- small tux...
-[L] time runs while being in in-game menu, at least a bit (jump, go to
- menu, wait a bit, leave menu, Tux will 'flip' to the ground,
- instead of fall, pause mode doesn't seem to have this problem, only
- menu)
-[L] catch exceptions thrown by lispreader