Nice little game and I made it to the end :)! I really like the graphics. I didn't like the mixed mouse and keyboard controls. I think for this game you can choose to go with either of that, but don't mix them.
I found some small bugs:
- The excalibur book can't be picked up when you drop it once
- I think the "E" is hidden behind the "back travel device" when you walk over the code book
- Sometimes when I came back to the control panel it had some inputs from my controls in it, e.g.: "waaaaddssssssdddd" :)
Besides that, it was a very nice experience, especially with the beautiful scenes you drew!