Very nice game! It's the kind of game I hope to make some day. One thing: I noticed that the red grid shown around archer towers displaying their range seems to stay there for a long time, and it isn't obvious how to get rid of it. Is there a way to remove it??
I noticed this too and actually figured out how to click out. You just click on the ground. If it's not the one you wanted to get rid of, click on the one you want to disable and then click on the ground and it will go away. While this was annoying at times, it was also useful to see if two towers overlapped and fix it if they didn't. So I'd suggest keeping it the way it is or making it so you can have it stay if you want it to.