I would like you to increase the rate at which Monster Mash drops and lower the bits for the machine. By now we all have at least 1 machine (me 24) so more mash for the hard work to get them would be a plus. Besides didn't you make this game for adults and later include or target it for younger players? FYI; the young players don't have the discipline to mine 5,000 blocks and if they do, they do deserve something for their efforts and not just a few more repeated bits.
I have talked to players who mined 5;000 blocks and got no bits at all. I mine 5,000 and get 2 batteries and a memory but zero Mash.
One last note: make bombing in mines produce zero bits as this to me is cheating. The bombers kill other players who are just there to mine, they also have more c than a normal player who can't afford bombs.