Ima be honest, I finished in 3 days, bought the pistol, shot gun and chaingun, and had full stats, never touched anything else, and it was not hard, if you are trying to make this into a genera type you will have to try harder than this
why is this not an actual game yet? If you added a "story mode", a seed generation for "multiplayer", and a menu or two, I would pay to play this game. almost to the point of name your price.
Just a quick thing, it really starts to lag once you stand to the right and get the coins to stack up, I dont know if you want to put a time limit or what, but it would be good for preformance
we've talked about making a server and then using GrindCraft as a way to accumulate resources on a mobile device. That would be cool.