Ok i see the issue (or a few)
-The cursor does not match up with the weapon. So trying to click the new upgrade is hard. (You need to click to the right of the box)
-The bugs kept spawning off screen causing a soft lock of sorts as i just sit waiting.
-And as already said before, I keep clicking out of the game on stuff that swaps my web page so i have to restart. Maybe add full screen button.
Cursor is to the left and up.
Just want to add that it is still a fun game to play 💚