I love the game, so I'll leave a good rating, but a few things:
1) I see no reason this game should ever lag, but it does. I get stuck moving in one direction or another and die due to unresponsiveness. Not sure what you built this with and how much control you have over performance.
2) I can't scroll the story on desktop? It goes off the page... I actually think the sliding is implemented in a really clunky way, even on the pages where it works (achievements and scores).
Other than that, I don't think I have any major problems with the experience. Some shortcut keys within menu contexts would be nice (hitting r to replay) for desktop users...
More than anything, I love that the game feels very expressive in a sort of elegant, although South Park-ish kind of way.