This is a million-dollar idea! This is such a fresh take on the bullet hell dodge-em-up genre.
The character movement feels suitably slippery but still manageable! I felt just barely under control while playing.
The art all looks great, and I love that you picked an underwater theme - it fits the carrying-capacity/treasure collection mechanic, and sets the game apart from the dozens of bullet hell games set in space. The thick outlines really make the sprites pop, and the assets are large and detailed enough that applying rotations doesn't distort them.
I wish the metric for victory was a little more clear - it seems like you just play all of the levels until the end, trying to achieve the highest score possible.