Information: - Gameplay. The player guides Mappy the police mouse through the mansion of the cats called the Meowkies (Mewkies in Japan) to retrieve stolen goods. The player uses a left-right joystick to move Mappy and a single button to operate doors. The mansion has six floors, four or five in some other versions, of hallways in which the stolen items are stashed. Mappy and the cats move between floors by bouncing on trampolines at various places in the house. Both Mappy and the cats can land on a floor on the way up, but not on the way down. When they pass in the air, Mappy is unharmed by the cats, but if Mappy runs into a cat anywhere else, he will lose a life. The trampolines will break if Mappy bounces on them four times in a row. The trampolines change color depending on how many times Mappy has used them without a rest. In addition to the Meowkies, the boss cat Goro (Nyamco in Japanese) also roams around. He is faster, but less aggressive than the Meowkies. Throughout the levels, Goro hides behind the different recoverable objects. If Mappy recovers an item which Goro is hiding behind, the player receives 1000 points. - Gameplay. In "Hopping Mappy" players control the Micro Police mouse, Mappy, as he bounces on a pogo stick to run circles around pink cats, called Meowkies, who patrol either vertically or horizontally. There is also Goro, a cat who patrols in a zigzag pattern, but he needs to take occasional breaks. There are eight treasures that a player must grab to complete a round, except on the bonus round where the player will just want to collect all the balloons that he can. The main intrigue here is getting past a blockade of Meowkies. The player controls are simple - he can bounce in any of the four directions, the only places he can land are the centres of the checkerboard squares (making for very few locations overall), and he will move at the same speed as the cats. If the player pushes the accelerator button and runs around, he will go twice as fast. When the cats have sped up (after a "Hurry Up" warning has appeared) they will match Mappy's accelerated speed. - Phelios ( Feriosu ) is a 1988 vertical scrolling shooter released for the arcades in Japan by Namco . It runs on Namco System 2 hardware . A home version for the Mega Drive / Genesis was released in 1990 . The game features a plot loosely based on Greek mythology . The player takes control of the knight Apollo , the god of the sun , who sets off on the legendary winged horse Pegasus , to rescue his lover , Artemis , the goddess of the moon , from the Titan , Typhon ( the one that Zeus dropped a mountain on ) . The game takes names and little else from Greek mythology in which Apollo , god of the sun , was actually Artemis 's brother . The game shows players an Artemis that acts as an stereotypical princess ( but in Greek mythology , she was the goddess of the hunt , and took pride in never being with any man ) . The arcade version of this game was never released in the United States , due to Artemis 's '' bondage / torture '' scenes , which were shown between each stage , and were similar to those from the new version of Namco 's own Rolling Thunder ; while no nudity is shown , the scenes were still somewhat '' strong '' to be shown in an arcade game during the early 16 - bit era . This game 's score display also gives the illusion of allowing values which do not end in '' 0 '' , like Hopping Mappy , Bakutotsu Kijtei , and Metal Hawk did before it - however , the smallest point value that the game can award to a player for killing an enemy is 10 . What is the relationship between 'phelios' and 'joystick'?
A:
input device