So far not bad. It has a pretty original graphic style while at the same time trying to rip super Mario gameplay. I actually love the graphics. Some of the sounds may be ripped from Super Mario Bros though, but I'm no 100% sure. They could just be very similar. Anyway, its worth trying. Especially right now while its free. Plus if they did rip anything I'd imagine it'll get pulled from the AppStore so I'd recommend grabbing it now for that reason too since it seems like a pretty decent platformer thus far.
Edit. Also to confirm before its asked, there's no IAP, so far no ads, its just a game as things should be.