from the opening level of Manic Miner. The screen is playable on the Amstrad CPC version, but there is no escape, save for the player intentionally killing off their remaining lives. Ports JSW II was originally created as an Amstrad version of Jet Set Willy (by Derrick P. Rowson and Steve Wetherill), but due to Rowson's decision to compress much of the screen data there was enough memory available to create new rooms as well. This version was subsequently ported back to the Spectrum which may also explain a number of other small differences, including the loss of coloured backgrounds in certain screens as the CPC version ran in a 4-colour display mode. The game was subsequently ported to other platforms, including the Commodore 64, Commodore 16, BBC Micro, Acorn Electron and MSX. The BBC Micro cassette version has 2 rooms not in the ZX Spectrum version, and omits 60 of the rooms, rather than being a subset of it as are the CPC and ZX Spectrum versions. Unofficial ports to the Acorn Archimedes, Windows/DOS and UNIX/X environments also exist. The C64 screen was a different format to the Amstrad, so the developers were unable to take the data used in the Amstrad and instead had to lay out again and re-implement all the screens and sprites. However, Rowson was able to use much of the data directly from the Amstrad, and hence the game was released sooner. In an in-depth article about both the game and the code, Your Spectrum stated that as each room was compressed and took up differing amounts of memory, a room editor would be impossible to code. JSW2+ In November 2016 Rowson released JSW2+ as a re-write of JSW2. As well as technical improvements to the code allowing for more complicated rooms, it has built-in ‘cheat’ devices allowing infinite lives and teleportation. Rowson also added some new rooms, and made many of the rooms easier with fewer or slower sprites. References External links Map of the Spectrum version of Jet Set Willy II Room format for Jet Set Willy II 1985 video games Amiga games Amstrad CPC games MSX games ZX Spectrum games Platform games BBC Micro and Acorn Electron games Commodore 16 and Plus/4 games Commodore 64 games Software Projects games Video games developed in the United Kingdom Video game sequels