It took me a couple of retries to eventually beat the game, and I stopped playing when I reached 9-1.
I like the animation of the enemies, they could probably be slightly more discernible from the background but it's fine, you quickly get to have aboslutely no problem distinguish them. The game controls well, the different upgrades are really satisfying, and the difficulty of the game is right on point, I like that it ramps up in the second biome compared to the first one.
Cool game, thanks for sharing.