So, I've found out about this HTML5 engine that works exclusively for browsers. It seems like a nice thing to use for small projects. An example of a Goo Create project is Mountains of Mouthness. Even though the idea is simple and unfortunately hijackable by unfunny dickheads, it works, the presentation is astounding, and it has some interactivity.
I would like to make something similar, but with a bit more emphasis on people interacting by utilizing in engine events rather than trying to communicate via a finnicky twitter system.
So, throw whatever ideas you have for a small scale "game" at me.