That's a good question. I didn't remember I joined this, until I got the announcement, so I'm caught a bit off-guard.
It's pretty useful to have a list of Ideas you want to try, but haven't got around to yet - regarding the BGE and Blender as a whole, mine involves:
- implement a game-of-life style simulation, and make use of it in some way
- improve pathfinding solutions
- figure out blender's GLSL pipeline, and make use of it in some way
- build a proper IK system, along with dynamically figuring out hotspots
- use Blender as a vector-animation tool for 2D
- find a proper use for compound collision meshes that's not Katamari Damacy.
- compile game-functions via Cython for performance reasons
- figure out a proper way of packaging Blenderplayer and it's dependencies, ideally in a multi-platform kind of way
- find an efficient way to re-map controls on-demand
- utilize a hardware-camera (or video-streaming in general) in the BGE in some useful way.
- dynamically generate and modulate sound according to gamestates
- use sound to drive animation
- build efficient lightmaps, for renderbaking without having to ditch realtime shadows
- multilayered 360 videos could be really impressive for a lot of things
- something using sockets for the achievement of having used sockets
- a clever way of utilising that HTML-parser, I've written
- write a dictionary-parser, and use it… ideally not with a chatbot
- make use of that renderbuffer, because it's there and nobody seems to know about it.
- find an entertaining use for a virtual-filesystem within a game
- make use of some economy models to simulate things
I guess, my entry will involve two or more things from that list, but atm, I have no Idea which make sense. It could be fun picking some at random, tho.