It's a game where you can clear stages using a keyboard. In this game, if you play the stage, the character walks to the right. It's a simple game where you press the alphabet key on the keyboard to safely let the character pass through before you reach this character. If the character passes through, the word clear will appear in the background. If so, well done, you cleared one stage. If you can't press the right alphabet key on the keyboard, the game won't be able to clear.