Join a long cave exploration with a boy and his best friend robot. The cave is very deep and you can use the parachute to descend. Pass through the layers and collect hearts. Avoid bats because they don't like your presence and they want to steal hearts from you. Try to fill the heart indicator to make the boy happy so he can say, that he saw the whole cave. It won't be easy task, because the deeper you go, the more bats you'll see. The game is very easy to play, but even more fun. Avoid all obstacles and get as deep as you can. Have fun.