Really hard game for an autorunner. I would suggest that you make the game a lot easier by routing the on/off scheme to one key or button. Here's how to do it:
-Have a scene variable named "switch," and have it equal to 0.
-When a player presses a key (a, b, c, etc.) and the switch variable is 0, have another variable (scene or global), and change it. Then have the switch variable equal to 1.
-When the player releases the key on their keyboard, have the switch variable equal to 0.