Is there an end to the game?
I assume you have to swap the cannisters between the tube and the machine with the wheel a few times?
Is the switch on the desk only to put the light on? Or does it have a part to play in acheiveing the goal?
After a few swaps the canister gets stuck in one or the other places so I've never been able to do more than 3 swaps/recharges.