Since getting this going I've been working my way through the back catalogue of software for the Psion, mostly from Jaap's website. My favourite game is Boulder (written by Jaap for the Psion Organizer II LZ, with the 4-line screen), which is inspired by the classic Boulderdash: you have to find the key, then exit via the window whilst collecting diamonds on the way and without being crushed or trapped by boulders. I've completed the first set of levels and downloaded the extended set. Thanks Jaap for such a great game!