Welcome to the caverns!
This is a short video of the Atari ST emulating the ZX Spectrum and running Matthew Smith's classic platformer. Please note that this emulator struggles on a stock 8MHz ST when the music is playing (or the screen scrolls). Of course, this particular game doesn't scroll, but the background tune pushes its luck, so turn that off for much better performance (then it's almost at the speed of the original).
