I apologize for leaving so many comments, one more point to address. The skill crit% should behave like the reprocess skill. As it stands, the best way to play is to do 0 crit constructs until the crit skill is capped. This could be confusing to players.
there is a critical point in the game. Somewhere around 200 speed balance breaks down any you get runaway inflation of numbers. I'm now at 200k speed. I'm at lvl 7 upgrades, and upgrade time is the only limit I have. Sylvia, the highest Roid unlocked, is proccing once per frame, and every 15 seconds or so I reset the levels and get another 80 skill points. I can get the construct material to build the highest level upgrades in milliseconds after selling everything. Some end game re-balancing is needed.
couple problems I've noticed:
1. saves don't always work. I've reloaded and had the game load a save state hours earlier.
2. once your food goes above +450/tick, growth doesn't stack right. I think overflow is cut off if the growth is over 1000%