I got to admit, the theme did not immediately fill me with joy and crazy ideas. However, with some brainstorming help from some friends, I have the idea.

The player is in a small arena with pillars stood around it, and (some task I've not decided on yet) that needs to be done, but, ever 10 seconds a giant ball of light spreads through the arena and burns the player UNLESS the player shelters in the shadows of a pillar.

So far I have an arrow as the player, and some white circles for pillar. I'm dreading getting to the art stage!