The basic objective is to move the block with the help of the arrow keys and not to fall off the map. Bridges and switches are located in many levels. The switches are activated when they are pressed down by the block.
There are different types of switches, soft and hard ones. Soft ones get activated by simply pressing down the block, whereas hard ones act exactly the opposite way. Mind you orange tiles that appear in future levels are fragile, so the block can’t stand on those tiles, you should only roll on them. There are many more features which you will discover as the game progresses.
Remember to write down the level code before you quit!!