So you should, by now, be able to get the notes.
You need to destroy the prototype and escape.
The timing might be a little tight.
There are multiple ways to solve this.
One is to get the notes, drop the bomb and travel back to a more convenient
Remember that you can set the bomb before breaking the window.
Good luck, you should be able to finish it all now.
It may just take some thinking and a piece of paper or two.
If you are still stuck or just interested, there is a walkthrough.
It can be played directly in the game via the 'replay' command.