Super chill game! I enjoyed the general vibe of the game, it was very relaxing. The visuals were gorgeous too! I liked the option to just change skins rather then grinding to unlock them, fits well for a jam but probably something you should change for a full release. It feels like it could be a good candidate for a mobile game with tilt controls and tap to dash.
Some feedback on the gameplay:
1. I could just stay in a portal and press space bar to get a large combo. I recommend once the player dashes to have that portal vanish for a bit before returning to get the player to move around more.
2. The one level with a long time scale was alright but felt like it was a bit to long, I recommend several different levels with different fish and a slower time (maybe 30 seconds).
3. A different sound effect per each type of fish plus maybe freezing it for a frame could add some nice juice to the game. It's very fun but could be a little more satisfying to hit the fish.
Overall, a very fun project. Great job!!!