Ok this point and click on everything has put me beyond annoyed to irritated. I have been clicking with various combinations all over every screen and I still cannot find the 3rd machine part. "Hidden nearby" is not a clue. I got the one from the Imp and the one from the swamp water.
There is too much randomness involved here. If you get a short roof and a couple of boxes your hosed...a bomb on a short roof...hosed...at high speed, you don't have a lot of time to react when a bomb shows up. There really needs to be some sort of speed control.
If you are having trouble getting the mug from the locker, make sure you have done the following steps in order, with the locker closed:
1>Read note on board.
2>Pickup coat on chair.
3>Open locker.
This should do the trick.
I'm sorry you didn't like it.