It plays and looks great. I've got it running at max resolution in widescreen. No input lag at all.
There are a few quirks though.
If you go to the options screen in the game, you won't be able to back out of it. And there are a few points in the game (between levels, some menu screens) where you'll have to hit the enter key to proceed.
When I beat the first level, the screen just stayed black.
It's still an amazing game though. And at $8.99, it's a great price.