Update v0.84

Changes in version 0.84

- Added levels 11 and 12.

- Started adding stalagmites and stalactites to the levels (still need to add to levels 6 - 11).

- Reworked the lava/slime lakes. Lowered for easier clearance under obstacles and updated material to give it a more liquid like appearance.

- Particle and sound FX when you shoot a cave critter.

- Added water drip particles and sound for a little more ambience.

- Fixed small placement issue with the snakes. (They poked out too far, revealing the base of the mesh)

- Adjusted the pain volumes on the lava walls to be a bit more forgiving.

In progress...

- More levels

- Want to add FX to the destructible walls.

- More music tracks possibly