UI needs a lot of work. Text size especially. I had to zoom in a lot to read the instructions. This also ruins the buttons when not full screen.
Despite most of this game being waiting, it stops when losing focus. Even clicking elsewhere on the page is enough to stop it. This is incredibly irritating considering how long the game is.
It would be nice if there was a glossary of units. The enemy often got them before I unlocked them, so I did not know what to build to counter them.
In the late game, the lower tier units are completely useless. It would be nice if there was either a way to make them relevant or hide them.
The +20% chance of points on kill upgrade needs a better description. It was certainly not 1 in 5, so it was either a typo or its an additional 20% of the current amount. Considering I thought this chance was 0 before, this doesn't seem right.