Nice art and music! However, I can't make this jump at the end of the second level (with the buble). I get that you have to jump and create the buble below you, but it's very hard to get the buble below you and it doesn't give you enough jump height to get heigh enough. The difficulty is also pretty high, since you only have one live. So perhaps you can add a health system (say 3-5 hearts).
