The music and artstyle are really cute. At first I had some trouble to realize that I need to scan the corals, because I missed some feedback (noticed that there was some dim highlighting later, but that's really not that eye-catching). The controls take some getting used to, I think a more traditional approach would be a lot more accessible. After noticing that the enemies only stun you for a short period of time and you get i-frames afterwards, I didn't really consider them a danger or challenge any more - so I just swam right into them and then used the i-frames to get through them.
It was a really fun experience nonetheless and was very pleasant to look at, nice job!