Finally got around to reviewing your game after playing it over the course of a few days.
I loved the art! Sprites are simple but pretty, and the enemy designs are creative. Speaking of enemies, I really appreciated the huge variety and how you programmed their attack patterns (I experienced some light bullet-hell moments in a few rooms, which is fun!). Music was enjoyable, but IMHO it wasn’t a very good fit for the vibe I got from the game. Maybe a more chill and melancholic track would’ve been better, something that would convey how deep the player has gone down the depths of the ocean, but that’s a minor nitpick.
What I feel this game sorely needs is a minimap. I got lost multiple times and had to take a few breaks after long backtracking sessions. Even some recognizable landmarks would have helped, as all rooms look mostly the same. I managed to get to the third area, then stopped once I got to that grey robot that would shoot down my rockets.
Lastly, I think you could’ve added more platforming challenges and puzzles, as almost all rooms were filled with lots of enemies and thought that movement abilities were slightly underutilized.
Overall, I’ve had quite some fun and it’s amazing how much content you managed to pack into this! Nice job!