This was a really enjoyable experience! Pretty simple mechanic and game overall that works pretty well, especially for a game jam! Controls were also simple and easy to get used to and the gameloop is also really simple and so good. I really liked the way you implemented a "tutorial" window explaining the whole game with videos on the side to illustrate the mechanics, really well done (I wish we did the same in our game but we didn't have time, unfortunately)! The only complaint I have here is that I think the game may be a little bit unbalanced and too easy with the revenge part at least. I think I had too much time to kill the fish and I was too powerful for them to run away. In fact, I only noticed there was an actual game over when you explained that in the tutorial part when I pressed the "?" button near the end and tried to lose on purpose xD. However, I understand you probably made this easier than expected to be more accessible for the game jam! So it's just a thing I wanted to point out as probably an improvement for later versions.
The game has also a really creative premise that fits perfectly with the jam's theme! You nailed this part completely but I wish there was just a little story behind the game (this is me just nitpicking but I like when games explain things with a narrative!).
Visually the game is pretty simple and great! I enjoyed the graphics and the feedback overall works really well! The VFX are good, the colors are well combined, the animations are really good as well and even the environment and the little background you have here adds up to an ejoyable experience! Though I would like for the dash mechanic to be more visually represented. It just took me a few seconds to notice how it works and it's a really intuitive mechanic but I wish there was like an animated circle or any indication along with your cursor pointing towards the place you would land with the dash, if you get what I mean. I think that would make the experience even more intuitive! Nevertheless, the UI is very well done and visually the game is enjoyable!
Overall I think this was a very much enjoyable experience! A really simple mechanic with an also really simple gameloop that plays well and blends in really well with the jam's theme! Really great animations and art and SFX that adds up perfectly to a greatly enjoyable experience! Congratulations on your submission!