This is a really cool game, and I quite like the concept of it! Having to explore connections between your computer and the game is quite an intriguing concept!
One thing I noticed is that this interesting connection between the dice and the OS is not mentioned anywhere in the game! If I didn't read the hints I'd have thought all I could do in the game was roll dice! One way you could fix this issue is to jump straight to level 2, have the game window bar visible from the start, and maybe flash the minimize button after your opponent finishes the intro, so people see it. Then you can have the readme file already open when the game is minimized. That way people's curiosity will naturally lead them to the readme file, an introduce them to the gimmick of the game without having to read the hints.
Overall though, great job! The whole game feels really nice and the "internal" game feels quite polished! The concept itself is really interesting and reminds me of speedruns of the original pokemon game, where every move they made was carefully calculated to manipulate the RNG.