The game is a bit to repetitive, it should have more controls rather than just "digging" , "building" and "speeding up". It'd be nice to see the game develop in some sort of way, by way of skill points, adding up to his stamina, strength, etc.

Also, power-ups would be a nice addition, that is if you implement dwarf-like enemy creatures. such as goblins, and other sieges. The levels are extremely short, maybe make each level a tad bit longer than the latter, and perhaps even harder as well.

Although this is cliché in the game realm, a lot of people seem to love it. (Which explains why there's a lot of them on here)

The same music that's in a loop can cause the game to get rather boring as well, making the game less interesting to play. Try using different themes and chip tunes in each level to keep the game fun and upbeat.

**The game is fun overall, but it still needs improvement**