It's a pretty fun little distraction - 5 minutes well spent, it was fun!
There's a few things you might want to address though:
1. There was a series of rocks around the 200m mark I came across that I really struggled to naviagte through, as the first rock would then cover the whole screen and make it impossible to plan a path through.
2. I had a strange bug on my first run. Not sure how, but I jumped, and my fish shot into the air, only to fall back down about 30 seconds later... I wish I had a gif...
Nice entry though!