I've heard of the Pico-8 before but this is the first time I've played a game made for it. I always though that the Pico-8 was just a simulated NES clone. Anyways, the game is pretty good, although I did have a problem where sometimes it would register mouse inputs despite the fact that I wasn't moving the mouse at all. My mouse is fine and I've never had this issue with any other games (with the exception being 3D games made in the TIC80, although I think that's just an issue with the TIC80 itself).
Great feel! Definitely could be good for a full release. I only wish more stuff broke. Loved it overall.