Bat In Nightmare
Instructions: Hold down a left mouse button to fly up, and release it to go down. Avoid obstacles by moving left and right.
As already mention, don't get confused if you never stumble upon Batman in this dark cave. The main character of the story is a little bat who's trying to fly through all the obstacles and reach the top of the castle in order to escape. Being attacked by spears and rotating daggers, he must constantly move and rapidly change the direction. No matter how how you climb up, it turns out there's no way out. Just like in a real hell. Therefore, the idea here is not to beat the game, but to try to earn the best possible score. Good luck!