It's possible that this is a dupe article, but I was just surfing the 'net (while the "other" network in the office was broken) and I saw the "Spectrum Games Compo". Yes, it's another game-coding competition, not unlike the Minigame compo that's currently running. Well ok, it's actually not much like it at all. The competition is open to Spectrum entries only, and they don't have to be "mini". So it you've coded a minigame on your ZX and can't squeeze it below the 4k mark, now's your chance to improve the graphics, gameplay, and sound, and enter it into a different competition altogether.
Currently there's 4 entries, one of them by (shock!) Jon Cauldwell. Does the guy actually stop? You have until the end of September to get your entries in.