A 32 years old bug in The Trap door, fixed by Nicholas Campbell, video by Novabug-
The fixed version by Nicholas Campbell of the Trap Door is availble on NVG. It allows to finish the game which couldnt be since 32 years, whereas you could finish it on ZX Spectrum and C64. A robot had to burn slimies in a cauldron, and it's now possible. Novabug just finished The trap Door on Youtube.