Dont rotate over y-axis.

Is there a way for this?

I try to make an 2d motocross game. But it always crash:S

Well, if you’re asking what I think you are, someone will probably tell you to constrain it on the y-axis. I would just cheat by making an invisible cube the actor, and scaling it up along the y. As long as your terrain is flat in the y-direction (and pretty wide), it should stay upright. Using a constraint is better, though.

I use constraint but is still fall :S