Wow. Really impressive and creative concept that was executed very well.
The "key" puzzle threw me off for a while. I didn't realize I could drag files and put them in folders at first.
A notepad program in-game would have been nice. Would have made deciphering codes and remembering names feel more immersive.
Sound design felt like it had some missed potential. it wasn't bad per se, but I felt like it could have better conveyed the desktop OS feel.
I liked the twist at the end. Good job!