Simplistic graphic, complex puzzles.
Rules change from level to level, only the 3 Buttons remain the same.
Various puzzles with no description. You must observe and reason by yourself.
You use the only three buttons to play all the levels. No hidden inputs, and you never need to press two button at same time.
Each level has different rules. Can you understand the function of each button?
Later levels are really difficult. Also you can challenge for the minimal steps.
[Designed in China]