As one who have played the original flash game for more hours than I dare admit, naturally I have been hype for this game since I came across it when it first got on greenlight and was very excited when I saw it pop up on the steam front page.
I was dissapointed, I got in the game and started digging, and the digging felt weigthless, the blocks just disappeared as with the old one you could see that you were digging through the blocks. And when I went to get upgrades there were no tooltips, no flavor text, only generic names and a set of boxes for each upgrade. It just felt empty.
Also the world feels too bright, this might just be an effect of playing on a high resolution, but it kind of ruins the atmosphere for me.
Other than that, They did a good job with the music and the fact that you can co-op (even though it's only local right now) is sure to be a big plus if you happen to have someone to play it with.
This saddens me, and I hope in the future they will do something to the game to make me want to give it another shot because it's such a good game and I know they can do better than this.