it seems like a good game, and I like the concept. Unfortunately, I couldn't go past level 2 because of the bug you mentioned in the description... it happened to me the 5 or so times I tried the level.
Apart from that, its fun to play, and if you're taking ideas, it'd be great to add more movement options, like pushing down to make a wheely, or ramps every now and then to make tricks in the air.
Keep the good work!