It's about as good as you could possibly expect it to be. The scoring system is a bit weird, and the whole thing lacks a little bit of polish, but I kind of found the platforming quite responsive! And enjoyed trying to plank in the highest, most precarious spots possible.
It seems to play fine for something designed quickly to capitalise on the popularity of planking. It has some sort of combo points system that I've yet to work out.
Worth it for the novelty at least!