I guess I've already made a "demake" of my game from last year :P
My "demake" of 3D Viper Maze can run on the original VIP CHIP-8 interpreter as a watered down infinite-random-mazes game. I've called this version 3D VIP'r Maze ^_^
I really don't know what to make for this year's Octojam though... I had a few ideas but those are all quite ambitious. And I have a lot less spare time this October than I had last year :/