The art is kinda rough, but the game actually plays really nicely I thought! You introduce mechanics one at a time at a good pacing, letting me get used to things before adding new things.
Unfortunately the depth of the actual game is a little thin for what's in it so far, but it's something that could easily be expanded upon I think.
As some general game-play comments, you might need some way to detect that there's no way to generate any more plant matter so that if that's the case and you're on 0 matter you should probably get some kind of prompt to let you know.
The last encounter I was at felt a little bit lazy in my opinion, just a giant room full of predators.
But yeh! It plays really nicely and the interface is good. Well done!