Welcome to the Arms or Legs 3D
In this game, you will be a variable runner who will compete with another variable runner, you and your opponent will have to run on parallel platforms with abysses and walls.
Because you are both variable runners, you can change the size of your legs and the muscles in your arms, the two are related, so you have to quickly balance these possibilities in order to reach the finish and not die.
P.S. While running, you can fail, keep this in mind)