This one is more difficult than most FEG games. The roof puzzle is quite a challenge..to the point of frustration. Game didn't freeze for me, but touch is off. Had to tap several times to pick up items or to zoom in.
Ads are annoying pop-up videos which must run, along with banner and pop-up full screen stills you can close immediately. I appreciate ads are needed for free games, but FEG uses too many in each game which kills the fun.