I've played this for a bit and it's pretty fun, but it stops when tabbing out and it does lag a bit with more units on screen (for me). since it's tagged as an idle playstyle it should run even in background no? I've downloaded the steam demo to see if that works better though. Minor nitpick: the pop-ups of the units when you buy them or other random pop-ups should be able to be turned off, the first time is fine, but afterwards it gets annoying