This is really solid. The gameplay seems simple at first but really comes into its own once you get to higher numbers of enemies and have to prioritize your mouse movements to click them all, which is neat because it's almost like you're the mouse dashing through all the enemies and cutting them one by one rather than all at once. I only made it to wave 27. I could barely do 8 enemies and then one misclick sealed my fate. Still got 5 of them though.
The art and presentation are where this game really shines, though. The spinning cartridge on the title card, the animated comic on the page, the old screen vignette over the gameplay, all awesome. The only thing I can think to improve is that the music, while good, is a very short loop and gets repetitive. Other than that, damn near perfect for what it is.