Having installed and intermittently played this game over the past day, I'd thought I'd provide a couple initial impressions from a newcomer.

Firstly, excellent work.  From what I could discern, no egregious bugs and worked as intended and while I could not see myself spending a large portion of my day immersed in this, it was certainly enjoyable in short bursts. 

I would however describe this experience as more akin to gambling than human mining.  The risk/reward element of having 200 hucs tied to a character necessitates constant monitoring, which is a prohibitive factor that will ultimately prevent a substantial number of people from playing.

My suggestion would be to have a secondary character class immune to attacks that is itself unable to attack, that just walks around collecting coins.  This would allow people like myself the ability to play for a few minutes a day without the threat of losses exceeding gains.  Call them gatherers and maybe tie 1500 coins to each individual character to limit their footprint on the map.  Not only would this generate new user interest, but would likely drive the price up considerably.