The controls for this game are absolutely terrible. The game itself is probably 20% of the actual experience. On an iPhone its next to unplayable - you have to do the same boards over and over because, using the tapped directionals or swipe method, the thing just doesnt respond correctly. On top of that, you have to (as a part of the game) REPEAT THE BOARDS AGAIN with limitations like high speed, number of moves/steps, or number of items picked up in order to earn keys that unlock later levels. I have never been so mad at my phone. I end up having to play something else to stop being frustrated with this game before I want to try it again. It really could be a fun game if they sort out the control issues. Hopefully this can get addressed in a future patch As an aside, EVERY device I have would crash with this in the early stages unless I got the keys on the first level before moving on.... just noting that in case anyone else has this problem (again, a patch could deal with that issue, too)