You can't resize the window or go fullscreen. There's no menu or way to pause the game. Because it locks your mouse, you can't quit the game without ALT+F4. The controls only stay on screen for seconds, not giving you any time to learn them. The actual gameplay is confusing, as it's hard to tell if you're damaging enemies or taking damage. The capsule art is a political shitpost, but the actual game isn't, which is tonally inconsistent.
On the plus side, it's simple, easy on the yes, and has small filesize. It's something.