As usual the polish is off the charts. The background music is an absolute banger. The game looks great too, everything seems great from the color scheme to the pixel art to the shader effects.
This game is quite fun too! I've played it three times while trying to put together my thoughts for this and it's always a good time. This is despite there being somewhat little variety in what you can actually do--by the end of the game, it seems like you might as well always have all the upgrades, and in the early game you can only afford a few certain ones anyway (unless you save your money). So I think the path I take through the game never feels too different, but it's fun nonetheless.
My one complaint with the game is that throwing the ball simply does not work. This is because, at least on the browser page, if I ever release my mouse outside of the window, the game doesn't notice. So then when I drag my mouse back into the window, I'm still holding the ball, and my mouse is not pressed, so to even release it I have to press the button a second time. This feels very bad. It means if I do want to try to throw the ball, I have to, like, stop my mouse slightly before leaving the window, and this often either kills all the ball's momentum so it doesn't kill anything, or I overshoot the window anyway and so just don't manage to throw it.
I'm not sure why exactly this is happening? I have seen issues like this with signals in Godot before, and especially with like mouse_entered/mouse_exited signals, but I can't think of a mouse click signal that might behave the same way. I did try testing both polling Input.get_mouse_button_pressed() and checking for InputEventMouseButton in _input, and both of those methods seem to detect mouse unpress events correctly, even on an itch.io page. So I don't know what could be causing the issue.
I will say, the one other thing is I really would appreciate a fullscreen button. This probably (?) would have at least helped with the mouse issues, and it would also make the game less tiny on my screen. I can zoom in on the itch page in Chrome, but this seems kinda silly. (I think you can just add a fullscreen button to the itch page and it will probably work?)
Still, the game is very playable by just holding the ball constantly and swinging it around. It's actually pretty cool that the game has this physics-based approach to the gameplay--you can just do whatever you want, as long as it manages to smush the guys somehow.
I think the fact that your upgrades are listed in GiB is very funny. The idea of installing over 200 GiB worth of a single antivirus program is hilarious. (Although, I guess the fact that it managed to recover around a terabyte of space on our hard drive makes it a good trade).