Extremely polished, there's so much there (I don't have time to read and learn it all, but it seems impressive!)! There's a lot of good juice.
In terms of starting with nothing... that added more confusion to me, than feeling fun. I feel like starting with nothing means I should eventually get something, and the something seems to be the ability to play the game? Which you get very quickly? But maybe I'm missing something?
Despite this, super excellent game, dang, it is so fun to hit, and I love how much there is - a training area, and the levels? For a jam game, I usually prefer it to be a little quicker, but I also love that there's a lot here. Really excellent. Well done.
Also, notes for credits would be good! Would love to know who made the music, etc etc.