If all that linguistics is too academic, try these links, that result from a hobby of mine from a long time ago: writing games for the ZX Spectrum. TRIBLOX is a puzzle game, kind of a bit like Tetris. Blip Blop is an arcade adventure. And Citadel is an arcade maze-type game. These games can be played on the World of Spectrum website via the above links (click on the 48 icon, next to the tape).