Barons Gate

http://www.kongregate.com/games/Griman/barons-gate

Fairly easy and simple game; aim and fire with your mouse, move with arrow keys or WASD.

Gold is 4B*1
I couldn't find life, damage or armour, but once you buy the top of the line gear, you don't really need it.

Bumping up your gold allows you to buy gear strong enough to make the game a cake walk.  It's annoying that you don't automatically pickup keys, so you may end up needing to backtrack or start a level again.  And don't break barrels or boxes inside the levels unless you need to; some of them are needed after you've flipped a switch to jump to the next level or to a moving stone.

EDIT:  Looks like plenty of hacks already, but I hadn't seen a post yet.  Hopefully this isn't a duplicate.