Well it isn’t possible in VR Editor and the conventional editor to change levels in-game/play mode. However, you can try running VR Editor in simulate mode. I have to warn you that it’s not perfect yet.
I agree, the current way with the laserpointer is barely usable. We need to find some way of doing it with the laserpointer and also allow some kind of virtual keyboard input. I have some ideas for virtual keyboards with the touchpads, but I didn’t have the time to implement that yet.