You are the red block and your goal is to reach the green circle. Use the arrow keys to move. The block will slide until it reaches a block or a wall. You gain twenty five points for each level you complete. Each move costs one point. You may also restart a level by pressing the "R" key this costs ten points. If there is any level you can't figure out how to complete you can skip it with the "S" key, however this costs one hundred points. You start with ten points and your goal is to get as many points as possible by solving puzzles. The estimated difficulty is an amount of moves it is possible to solve the puzzle in. This does not mean that it is the minimum it is just a good estimation of how hard the puzzle is. I would recommend use turbo mode to make it run faster. You can do this by holding shift and pressing the green flag.
