I'm not posting to hurt your feelings. I just think you need some truth and constructive criticisms...
-Add some story and world building, right now it's just shapes that explode sometimes.
-Do some bug checks of your economic system. ex) Capacities won't increase
-Profiles...
-User interface needs some work.
-keybinding on scroll wheel zoom feels reversed
-hover/single-clicking buildings should highlight
-what does the question mark do?
-Combat deployment system is confusing
Overall the game feels like it's still pre-Alpha development. Definitely not playable in its current state. And on a side note, I would focus on basic functionality before incorporating a "pay-to-win" system. And if you must use the "pay-to-win" system. Make it make sense. I rushed a 30min upgrade for 14 emeralds and a 2 hour upgrade for one emerald.
The windows need to automatically close when you select something else. Closing the production window to try and snag whatever a ship is selling get old real fast. As has been said workers should spawn in the middle or allow scrolling while dragging a worker. The "one-short-of-everything-being-upgraded" is just weird. There is a glitch where workers get stuck in a position and can't be removed without firing them(Specifically the teaching room). I think thats most of it but otherwise a good game.
Game should scroll as you move the mouse across the screen, not drag to scroll or "a" or "d". Since all you do is spam arrows, dragging the screen takes away from firing time
These mushrooms are resiliant, the can survive, gunfire, tesla archs, eplosives, and nukes. Yet, soehow a little bunny can hop along and just take them. Natures funny I guess...