‘Exploratio’ – stalactites, stalagmites… and the BIG BAD.
Got some ideas for ‘Exploratio’ (the name of my game) whilst messing around with my particle system code.
A side scroller where you walk through a cave… and there are stalactites and stalagmites… and something that hides around them. you need to shine your light in places to see them, and throw explosives on the BIG BAD.
When dropping bombs down, or throwing bombs up you need to avoid the explosion.
Your torch will not illuminate the whole cavern. So you need to walk under the tites and mites to shine your torch on them… but then you have to watch out for the BIG BAD… which could be hiding underneath the bridge or above the bridge!
OH FUCK!!! IT SOUNDS SCARY… 
A bit of blending(alpha, MULT, or ADD) for the lighting. With a little light around the character, and light where ever the torch goes.
Then some collision detection with the particle system explosions. Or maybe you need to throw flares to light up the area, and get the BIG BAD with a whip. WHIP IT!
Now to draw some caverns, and a bridge I think.