Sorry, there's no screenshot showing for me. The rewind system (see spoilers hidden on game's page) is designed to help if you need to retry puzzles, collecting disks may also cause you to get 'stuck' but for those you're supposed to reset.
Ah ok, I finished the game since then. So I saw in one of the readme that the server A, B and X need to be rubbed. I thought that that is a hint so I need to smash all the three Pico8 butons at once (Button A, B and X, which are X,C,V in my keyboard), So I did it several times while the screen goes purple with an error message: "Out of memory" which I thought that all part of the game. I didn't realized that one button saves a checkpoint and that's while I heard the *beep* sound and everytime it's occupy a little more from the RAM getting it full.