This is definitely more of a tech demo than a game. It has no sound and very limited animation, but you already know that.
I didn't realize I could double jump at first, and it didn't seem to work consistently. Was it tied to cake? This could have been explained better, even if it was just a line of text on the itch page. The movement feels kind of floaty, but it's not awful, and the forgiving ledge detection is appreciated. The level had the feel of the jumps looking really difficult while being quite doable, which I'm not really a fan of, but that's probably down to personal taste.
For something thrown together at the last minute, it's not bad, though, and infinitely better than no entry at all.