Beat it! I agree with the things the other guy said, and I have a few more thoughts to add of my own.
First off, everyone names their game file MizJam1, so if you want to help people find the game in their cluttered download folder, name the file Sewer Scamper. Not a big deal but something to keep in mind for the next game jam!
I occasionally ran into a bug where my fish was thrown diagonally, and it really threw me off when it happened.
Game was a solid entry with a pleasing color palette, I liked the red especially (btw did you get that background color from a template or something? I've seen so many games with that same color background)