This game is beautiful and very creative (beautifully simple =P). I loved it!
A hint to newbies trying the game: You can press space bar at any time to go back to the puzzle screen.
I don't know why but in the earlier stages I thought I was just stuck after pressing space bar once haha.
Ok so level 13, a good fix would be to either not have the dragon cannon at all, or have the centre blue bouncy.. circle thing... go up further so you can fall past it.
 "Continuity"){kind=icon}
 "Sushi Cat"){kind=icon}