I haven't seen game design this excellent in a while. It tells you how things work and what you're supposed to do through its design alone. The starting area let's you figure out that you can control the ball by tilting your device. Next up there are some blue obstacles to put your newly gained skills to the test. After this you come up to a green object blocking your path. Intuitively you'll try bumping into it and find out that green objects are movable so you can push them out of the way. Finally you reach a large glowing thing, the goal.
This is just the first level, but it teaches you all the important concepts of the game without needing to actually tell you anything. This truly is excellent game design. The problem is that it DOES tell you how to do everything. Every time you encounter a new obstacle, the game freezes and explains you how to get past the obstacle rather than letting the player find out for themselves.
That said, the rest of the game is actually very good. After the first few levels it doesn't interupt you anymore and gameplay feels smooth, fun and challenging in a good way.
