That's really funny, I had keyboard controls until the last minute to change your build selection, but I took them out because I never used them, so I instead did camera movement. I should've probably kept them on a set of dedicated keys just in case!
Regarding performance, I only ever saw a decrease on my crappy laptop when spamming a lot of trees, so I didn't really pay too much attention to it. If you played the browser version you can probably get better performance on the desktop versions.Thanks a lot for playing, and for your kind words :)