This is a cool idea, though I think having an idle game that requires hand-eye coordination is a bit much and can feel a bit tedious. The lose condition is also too throttling and (may just be me) I died too quickly.
I think what could improve this a bit would be something that makes it easier to click on people. Maybe clicking the earth can kill a random person, or there can be projectiles from where you click that hit multiple people at a time. I like the upgrade system but I wasn't given enough time to explore it. I found it unclear when I was going too slow as well, is there a visual indicator?
Also while the screams were funny... to be honest they got a bit annoying lol.