How do i fix a endless runner not jumping and going backward

Hey guys, i have a serious problem with my endless runner.

You can play it here http://alydus.net/games/thief/

When the player runs sometimes the player goes backwards and does not jump.

I've attached the capx as an attachment here.

[attachment=0:2dyn14q0]Thief.capx[/attachment:2dyn14q0]

I urgently need somebody to fix this.

Couldn't open it because I don't have the Clay.io addon. :/

be sure the collision polygon does not change (the platform behavior works best with a fixed rectangular shape), as this is most often the reason behind jump not happening.

Aphrodite So what exactly do i need to change? As the animations are all different sizes...

brunopalermo I'm actually quite surprised you don't have the addon, it's great for scoreboards and achievements and stuff, i recommend you take a look at it, you'll love it.

I just made all of the hitboxes square and that has fixed the not jumping on every input sometimes bug, but the player still stays at side of the screen and cannot keep up with the movement of the game, to fix this temp i added the bound to layout behavior.