I'm getting tired from the initial push, and want to come in fresh for the first full day tomorrow. So far, I think I have a decent start.

The game concept I came up with uses the word "Unbalanced" as a synonym for the word "Unstable." It's a 2D platformer where the game is unbalanced to favor the enemies. The player levels up with each enemy kill, and wins when they shift the unbalanced game in their favor, becoming too powerful for the enemies. Here's a screenshot of the player and a prototype level layout:

I'm primarily a gameplay programmer, hence the basic rectangle art. I managed to get the movement and jumping working after a pretty nasty physics bug made itself known out of the gate (because of course it did). The time I spent fixing that is why I need to step away for tonight. Still, it was a critical bug to fix early. Overall, I'm satisfied with this as a start. I have a concept outlined, a checklist for the development steps, a prototype level, and the vital platformer mechanics of moving and jumping.

More updates to come!