The color scheme was lovely harmonious. The game was challenging and many times I forgot which way the Manta ray was going and then I hit the fish :D

Excellent take on the theme! Nice job

You put together a fun idea in such a short amount of time! The pulling back and forth with the ocean current was a great idea. I also appreciated having a ranking system with the score so you can better gauge how well you did.

Intriguing controls scheme. Music is fitting, but I did feel the sfx for shooting and hitting a fish are a bit overwhelming. I also believe that some variety would have been nice, either in fish movement patterns or in weapon choice (as in other classic shoot 'em ups). Overall, good for such a small amount of time for a solo dev!

The twist of the two portals really adds something fun ! Great job !

I really liked the visuals and graphics and I think that the background soundtrack perfectly matches with them, but I think that I can't say the same for the sound effects for game over and shooting.

Then I think that adding  a new mechanic would have made it even better since now is a bit repetitive. 

Anyway it is a cool simple game and I really liked it!