Complaints:
1) The beginning is way too slow in my opinion. Especially as a player who doesn't already know the best way to play your game, it takes a long time to get to the point where I'm making any sort of progress. I would say just to double the speed the biomass generates at, or at least increase it significantly, since that it what I always have to wait on.
2) RockyMullet already said this, but yeah better explanation of how the game works would've been nice. Something he didn't point out though, is that we have no way of figuring out how much or something things produce. Like we don't know how many machines each rain condensor can fuel, or how much water certain machines take. Take Factorio for an example. If you go through its UI, it's full of input and output number, and you are able to figure out how much or something you need to power machines. That was something I thought was missing here.
3) Much smaller of a complaint, but the background looked off to me. Probably because it was a different resolution and it had no shading, which just didn't look right when comparing it to the machines.
Compliments:
1) The game itself is very well made, even if it isn't balanced what well (my opinion!). All of the system were really cool, and for a game this small in scope, it really does manage to achieve a lot. Even if the slowness at the start prevented me from getting very far, I still found myself trying to figure out the best way to generate power and food, and coming up with different strategies to do so.
2) The music was also really nice. It was subtle, but it provided some really cool atmosphere and also fit with the story of the whole game.
3) No bugs that I saw! :)