My only issue is that since the DLC was released I can no longer play online on linux. It says "Inappropriate behavior detected" no matter what. Didn't even buy the DLC.
So the most accurate and helpful descriptor would be "mario-like 2d platformer," but then you might have no reason to click on the link if you're a weirdo who thinks "Oh, that might mean a game like Mario Party!" ;)
Whining about being downvoted (BY ONE PERSON IN THIS CASE) is a great way to ensure that I downvote you.