It's a great concept and an addicting game, but it has a lot of bugs. For being coded in 48 hours, this is very understandable, but I do encourage that you go back to fix the bugs because this could become a really great game. For one, it tends to lag a lot with multiple enemies on screen. The enemies tend to disappear and every screen that I was on, they completely froze and stopped moving. That's hard to complain about because it made the game a lot easier. c: But I did die or three times very unfairly. I was digging a tunnel underneath the enemies, and I would keep getting hit (for what looked to be no reason) and die. Only after I died did the enemy become visible. They apparently lagged through the dirt down to me (I had one line of blocks separating us). It's a very fun game but that in itself kept me from playing again. I feel that some sort of check point system is essential in this game. I get the appeal of a challenge to see how far you can make it, but at the same time, it's very frustrating for the player to have to start at square 1 when it's quite time consuming to gather all the treasure, especially with all these unfair deaths.
It would be an interesting feature if even when you died, you still could keep your stack of treasure and it builds up. Then again I'm thinking of the game Luigi's Mansion. Every time you beat the game, all the riches you had collected added up. It's just a silly little idea. You don't have to take it into consideration.
Despite what someone said, it didn't remind me of Terraria at all, or even Minecraft, which is a very good thing. I think it's very important for developers to make a digging game that stands out and differs from the already popular games out there. All and all, this is an addicting game. It has a lot of bugs though and if those were just gone, I could see it going on the front page or something.