1. Gray balls. If they fall in the holes - you lose.
2. Worm holes. Some have as many as 3 wormholes at once.
3. Fences that can be unlocked if another ball lands at another key square. I've never seen this in a tilt maze game before.
4. Getting 3 stars for a level - use the minimum number of moves in the shortest time.
There are 100 levels and they get pretty hard. At the moment, I've done about 55 levels and am stuck because I didn't get 3 stars in all my levels. What I don't know is whether my solutions were done without using minimal moves or without minimal time.
Graphics are cool.
Other Tilt Maze Puzzle Apps
Squarescape - very polished
Woodhead - love the humor
Tip & Tumble
Clickmazes - not an app. Online puzzles.