Oh, by first level I meant first level that wasn't a tutorial. You have a bunch of tutorial, then a "real" level where I had to bounce to get out, and only after then there was a level with a text telling me I could bounce on bubbles, which I already realized
Viewing post in Quad Colossus jam comments
The solution for that level was actually just to jump into the smaller bubble while large (as you should keep most the speed from before but should also be small enough), and land on the platform. I would've made that better, or moved the level further out, but I didn't see your solution until after the jam.