i am editing my review coz i observed the others had a lot of complaints. Guys, i agree that it's difficult once you get to higher levels but hey, if you try and figure out the best way to beat them levels, you'll realize that it's beatable whichever level you play on. well i don't know about the others buy figuring out how to beat tricky puzzles or difficult problems is kind of my cup of tea. try utilizing the hourglass booster to its highest extent. i hope this helps if you figured it out :)