This is an interesting one! The physics are fun to mess around with; I really liked trying to make flips and big jumps. Especially when you get to the level with the flippers and bubbles--zooming around that pool is a real blast. I also like how you get exp with air time and "level up" throughout the game. And being able to infinitely level up your acceleration time meter is a nice reward, since going through the game at high speeds is really fun. :) (I stopped at x7, btw)
However, I do have a few complaints. The original 1x speed is quite slow; I pretty much immediately played on 2x, and increased my speed when I got the 4th level up.
Also, the sound effects could be better. The "level up" sfx sound likes an alert meter. And the diving sound gets very repetitive if you play sped up.
Finally, there is no reason for there to be diving boards and slides in this game! I know you want to make it look like a pool, but the player can't even use them, and the diving boards stopped me quite a few times from making an awesome jump. Either take them out, or relegate them to the background, or perhaps implement them after the jam? It would be fun to use a diving board on the moon. Also, would really like to see a "best jump time" somewhere on the screen.
All in all, a fun little game. Thanks for making it. :)