Fun game! I really liked doing jumps and flips through the levels, the pink boosters were definitely my favourite part =)
The framerate was a bit low but Im willing to say that's up to WebGL issues. Also the second level wasn't great imo just cause the best/only way I could think of to avoid the spike balls is to slow down to a stop. I think the level design could've been focused a bit more on the platforming or jumping aspect since that's definitely where the mechanics shine.
Great job overall!