This keeps happening to me. Having finished my first entry much sooner than expected, I fished around for another game idea. After a bit of flailing, the idea presented itself... and it was also done much sooner than expected. There are several reasons for that: I'm getting used to coding in Sinclair Basic again, my schedule just happened to be very convenient, and my habit of trimming features early kicked in as usual.
Anyway, with two entries in the jam it's time to stop (though suggestions for improving them are welcome). How's everyone else doing? Because it's been kind of quiet for the past few days, and there's less than a week left.