I had to restart the demo two times, before I was able to test it. The companion kept jumping out of the level before.

The ai doesn't seem to be very complex, just follows the player as fast as possible to avoid the need for complex pathfinding. It occurred several times to me while I have been running through the level, that the companion was unable to follow me. Quite nice for simple games though. Maybe you should work longer on your ai to make a really good one