Elthus

Dive deeper and deeper into The Caves of Elthus to replenish your supply. But be careful, the farther you delve, the more dangerous it gets.
(Fullscreen Recommended)

Controls
Move - WASD & Mouse
Fire - Left Mouse
Throw Grappling Hook - E
Grappling Hook Movement - W (Repel), A (Left), D (Right), Space (Unhook)

I recommend playing around with the grappling hook. After a little practice you can make a lot of different movements.

Post your highest score in the comments! I've hit 2000.