I enjoyed this one. It reminded me of those old jetpack-style games, which made it feel pretty nostalgic. The underwater atmosphere and pixel art were nice, and the movement felt responsive.
My biggest issue was the difficulty. I couldn't make it even halfway through, so I wasn't sure if there were more levels or if the game was meant to be one continuous run. A slightly smoother difficulty curve or a few power-ups/checkpoints could help keep players engaged without taking away the challenge. Overall, it's a solid jam entry.