Thank you so much! There's a lot that I still want to do, but I'm glad you're already enjoying it! A controls & hotkeys screen is definitely needed, as well as some other quality-of-life stuff!
Sorry about the crystals, I think they're a little too aggressive at the moment! There is some tech in T3 and T4 that lets you deal with them, but I think that's too high up in the tree to be useful. I'll be rebalancing a lot in the future :P
Thanks again for playing!