Enjoyable game. SImple yet addictive. Better than some paid for digging games on steam. I love the fact that the ores/rocks would fall down and not just sit in the air. I didn't like the random pixels that I could not dig out and would bounce off of when I was jetpacking up.
Apart from that. Very enjoyable and would love to play a more complex version. I would even buy it off of steam! xD