Version 1.50: bugfixes and improvements

Hey! 

Since the jam period has ended (I presume), I have taken your feedback to heart and fix the bugs and weird choices I had made. 

Changes: 

• You cannot repeat the pianist scene anymore.
• The pianist's dialogue now nudges you more clearly in the right direction.
• Added the ENTER key to the computer's accepted keys to boot into MindOS.

If you find any more bugs for me to fix, please let me know!

Thank you so very much for all the advice and support! It truly means the world to me seeing people enjoy my work.