The concept works really well. It's a neat gameplay mechanic because you have to choose between being certain of where you're going and not running out of gold. It does seem like there could be some things done to make the game more clear -- when you push an arrow key, there should be some visual or audio cue of some kind to show that you actually did it, the spike squares should maybe be more clear, there are levers on the wall that seem interactable but aren't, and it seemed like at one point my controls got reversed for a bit and I wasn't sure why. Also, was the room with the big chest the end of the game? I got a bunch of gold but the staircase wouldn't take me anywhere.
Anyway, like I said, the concept at it's core is actually really clever. Great job!