Very neat concept and I loved the music, but it felt very random and luck based on whether or not big bubbles showed up at the right time
Viewing post in Up For Air jam comments
Every level puts together a set of spawners (for bubbles, small bubbles, and jellyfish, and optionally fish). The bubbles (aside from the ones that are spawned on level start) spawn at a fixed distance apart, once every X seconds. The column that was spawned the longest ago is the next one up once it surpasses the timer. So it's very random but you still generally get a whole row of bubbles spawning around the same time (every X seconds, and X pixels apart, which is configurable per level). I think it gets really annoying when the time between spawns is low rather than increasing the distance, since it makes it more of a timing issue than strategy. And the jellyfish and fish spawns can sometimes be almost physically impossible to get past without dying, which wouldn't happen in a hand designed level. But since fish and bubbles disappear after they go off screen, I'm not sure how I'd make a level by hand.