So now you can throw and recall your flames to help explore the dark. This will be the main mechanic that will let you explore the dark dungeon (sewer? whatever...) and avoid all the nasty traps. The problem is throwing away your flame means that you lose the ability to see what is going on right around you, so it is a trade off.

Next, I just need some enemies (some of which are attracted to the light, some of which are repelled by it), water (to put out the flames) and some good old traps (spikes and such).