Very fun game! I wonder how much more stressful that ending would feel if the timer was still there. It's hard to feel much of consequences when it's just actually always beneficial to do the thing, despite the warnings.
I think my favorite mechanic was antimatter. It's a pretty cool mechanic, and I'm surprised by how little I was ever actually waiting on antimatter. Though I can't judge the left side that well because obviously doing a side is going to be way different if you do it first compared to second, and I went right first. The left feels slightly too standardized for it to really feel interesting imo; I think it would've been better if the different plants at least costed different resources.