Terrible. First few levels are good, but then they get incredibly greedy with tons of long duration ads after every single level. And if that wasn't bad enough, now they're using deceptive ads that make it look like you need to update the game when in reality they're trying to trick you into downloading entirely different games. These folks are no better than scammers. Stay away and be careful if you do play. Who knows what they'll try next to extract more money from this "game".