I liked your game submission. It was solid, and the pacing was just on point. I exactly got all upgrades for the final level.
For one enemy type, it was a bit unclear if you could damage it or not. I could not figure it out, as it went a bit against the general coloring cues.
One thing that was a bit strange was that sometimes hitting a fish with the harpoon caused it to disappear and award money, while at other times it just launched the fish away. Couldn't figure out what the logic was in that. Also, the hitboxes were a bit janky.
Overall, very good theme and execution!