Saw that this game was being talked a lot about in the discord and after playing it myself, it's for good reason!
To start off, this is an extremely polished game for a game jam. The animations for the player, fish companion and monster enemies (they remind me of giant aggressive tadpoles for some reason) all look really nice and smooth, I see from the comments on your game page that you used procedural animation to achieve that which is cool. The minimalistic art style is utilised very well and adds to the overall atmosphere of the game along with the particle effects and the player character reminds me of the character from journey but with a bird head.
As for the gameplay, the player controls very well. It was pretty depressing though when my character accidentally hit a bomb and then its lifeless body proceeded to get flung around as it detonated more bombs XD. I really liked the fish companion as an indication if you could use the double jump or not. The only thing I didn't fully understand was what triggered the tadpole monsters to become aggressive as sometimes they'd be fully turned around while I was moving around and they would suddenly become aggressive.
The music and sound effects were excellent too and I particularly liked the sounds the tadpole monsters made.
Overall, a game well deserving of one of the top spots in the jam. I do have to agree with some of the previous comments that innovation is marked down a bit as when you set aside the great amount of polish, it is a pretty simple platformer. I do however think that this does not detract from any other areas of criteria as I still believe you achieved the jam's theme through the minimalistic design as well as design through subtraction. Amazing job!