+[L] Allow any object to be inside of a [?] box, ie. trampoline or badguy
+[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
+[L] fadein/out for intro/extro would be nice
+[L] we only have a global counter for multiple coin blocks. This should be handled
+ per block.
+[L] AX_CHECK_GL produces an error during configure, when something in
+ configure.ac changed and it was automatically regenerated by make (instead
+ of the user doing ./autogen.sh)