How make a Infinity Run 2.5D

[andre]

I'm trying to make a infinity run game, but i don't know how to make the character to turn to the left/right and keep walking. If press Jump, without any other button it works, but if i just press letf or right he still playing the walking animation, but without move. I don't know if i make myself clear. But could someone help me?

[Invector]

Infinity run games usually just run into one direction, you want the character to automatically run but you can set the left or right?
Anyways to make the character move you just need to give it input, so basically replace the input to a fixed value