Three comments.
1. Could you put a third joint in the arm right at the end where the box with the drill is? It would make it much easier to get the angle you want.
2. Could you adjust the speeds to make it easier to control? The base of the arm and chair are both quite slow, but the first arm joint is ridiculously fast.
3. Could you switch away from the numpad? It is annoying having to toggle the numlock on my laptop.
EDIT:
Woops, forgot to say:
Otherwise, it is utterly amazing!!
I don't think water can boil. Unless I am missing something, there is no way to make any non-physical energy, meaning no light and/or heat. That said, someone did manage to make a "coal-burning" thing. Something similar could possibly be used to fake it...
One problem. It only works because of how Phun works. In reality, objects "slide" through space. In Phun, they "warp" to their next position as calculated by physics engine.