Thank you for your feedback! When you restart the first computer, it doesn't give you more points, it just resets the counter + 100 points that you earned for connecting.
The rewind was because at first I made the player unable to move anymore when you run out of wire, but in the end I decided to change it because the game became much more difficult, so I disabled that mechanic and now you can use the rewind as an option to avoid the guards.