Thank you so much for the kind and thorough feedback!
It seems that several people have become stuck at the same point with the computer, but I have not been able to confirm that it's a bug. Do you recall if you had used the wrench and hotsauce on the thermostat already? The thermostat should tell you to use the computer. (Also, out of interest, did you use the sandwich on the mouse hole to get the key?).