with only 1 tile space above it
- when jumping into the exit with a star, the endgame music will change back to
levelmusic after a short time
+- the can_jump flag should be based on a time instead of the 2 tiles check.
+ Since the 2 tiles flag won't help when you're jumping over a hole. Better use
+ a timer that is started when up is pressed, when you then land and the timer
+ is below a certain time, you can do the jump.
+