I made the game trippy. It's a game that tests reflexes (reflex C)! From the back of the screen, an arrow approaches. Press the opening direction of the arrow with the arrow keys on the keyboard as in the vision test. If you press in the wrong direction or if an arrow comes to the front of the screen, it will be an error. Game over if you miss 5 times. Accelerate gradually! How far can you endure! Take the challenge.