LoadOnEnter.cs

using UnityEngine;
using UnityEngine.SceneManagement;

public class LoadOnEnter : StateMachineBehaviour {

    public static int nextLevel = 0;
    static int maxLevel = 10;

	 // OnStateEnter is called when a transition starts and the state machine starts to evaluate this state
	override public void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
        if (nextLevel < maxLevel)
        {
            nextLevel += 1;
            SceneManager.LoadScene(nextLevel);
        }
	}

	// OnStateUpdate is called on each Update frame between OnStateEnter and OnStateExit callbacks
	//override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
	//
	//}

	// OnStateExit is called when a transition ends and the state machine finishes evaluating this state
	//override public void OnStateExit(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
	//
	//}

	// OnStateMove is called right after Animator.OnAnimatorMove(). Code that processes and affects root motion should be implemented here
	//override public void OnStateMove(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
	//
	//}

	// OnStateIK is called right after Animator.OnAnimatorIK(). Code that sets up animation IK (inverse kinematics) should be implemented here.
	//override public void OnStateIK(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
	//
	//}
}