ArrowKeys

Gameplay:

Each block features a directional arrow. Tapping a block causes it to move in the direction indicated by the arrow. If there are no obstacles in its path, the block is removed; however, if an obstacle blocks the way, the block cannot be removed, and the move does not count as successful.

You must first check for the presence of obstacles.

Of course, you can also move the obstacles themselves to clear the path for subsequent blocks and achieve victory.

Different levels offer unique gameplay mechanics; a little experimentation will help you quickly grasp how to play.