Listening to: Nothing.
Here is a project I was working on briefly before realizing that, well, I had nowhere to go with it. I was trying to add some kind of twist to the chain reaction type game that would make it more interesting. I was thinking of having the combustible shapes orbit, requiring a user to place and time things to set off a reaction properly.
The issue was that chain reactions were too easy. I suppose changing the speed of the orbits and size of the orbits could lead to more strategic gameplay, but it ultimately wasn't that fun.
It may be something I jump back to eventually, but it's on the abandoned list for now like Ikuze.
Somewhat Related Link: Orbit Gum -Jumbo Variety Pack