Information:  - Metamorphic Force (  ) is an arcade game released by Konami in August 1993 . It is one of Konami 's last side - scrolling Beat ' em up games to appear in the arcades along Violent Storm . The game mechanics are similar to those of Konami 's earlier arcade hit , X-Men , and runs on the same hardware as their ninja - themed game , Mystic Warriors .  - Gameplay. The game's controls consists of an eight-way joystick and two buttons for attacking and jumping. Like in "Sunset Riders", the player can jump between higher or lower levels, as well as slide. The player character attacks primarily by shooting an unlimited supply of shurikens/daggers, or using his/her weapon at close range. The game includes some improvements that were not included in "Sunset Riders", such as the ability for players to change characters after they lose a credit as well as a life gauge that allows the player to sustain up to four hits from enemy attacks before losing a life.  - Konami is famous for popular video game series such as "Castlevania", "Contra", "Dance Dance Revolution", "Gradius", "Frogger", "Suikoden", "Ganbare Goemon", "Metal Gear", "Mirmo", "Beatmania IIDX", "Pro Evolution Soccer", "Boktai", "Silent Hill", "Yu-Gi-Oh!", and "Sound Voltex". The 2012 purchase and absorption of Hudson Soft resulted in the addition of several other popular franchises, including "Adventure Island", "Bonk", "Bloody Roar", "Bomberman", "Far East of Eden" and "Star Soldier". Konami is the twentieth-largest game company in the world by revenue.   - Gameplay. Gameplay in general. In IIDX games, players recreate the musical score of songs available to them through the use of a DJ simulating controller. The player must coordinate their hands in order to hit the correct keyboard buttons, spin the turntable, or a combination of both in correspondence to color-coded notes that approach the judgement bar displayed on screen. Notes are divided on screen by columns which separate them accordingly to match the seven buttons and the turntable on the DJ simulating controller. As a result of hitting notes, different sounds are then produced throughout a songs duration. Correctly hitting notes will produce an accurate musical score, while incorrectly hitting notes will produce inaccuracies and mistakes in the music.    What entity does 'metamorphic force' has the relation 'input device' with?
Answer:
joystick