Sorry about that! I’m aware of that bug, and am working on preparing a patch for it (among other things) for after the jam period ends.
In case you’re curious, the bug appears to be related to how baby Stardrops will return to their original bubble if you die before first bringing them to a checkpoint. If they reach their original location before the screen transition, a new bubble will be created - then, during the screen wipe, additional bubbles are created for any babies that didn’t reach their spawn points in time. The bug seems to happen when you die while on top of one of those original spawn locations; something in that process goes wrong, and the game creates extraneous bubbles. It happens most commonly in area 2 (the tropical/beach-themed one) because the bouncy ball planets have a habit of killing your momentum and stalling you in place. This can crash the game if you get more babies than the normal maximum of 15, but your message suggests you just so happened to avoid that, which is good!
Sorry for the inconvenience, but I’m glad you enjoyed your time with the game :)