Ok just got done playing it and I have a few comments...
1) Tint the normal earth so that it's brown.
2) Tint the Bronzium to be brownish, you can't tell the difference between the normal earth and the bronze.
3) Show the names for the buildings (Ancient of War instead of Fuel Pump? lol)
4) Your missing a repair station.
5) The "You've passed out" thing is confusing.
6) Tons of Typos
I'd give it a 4/5, I love the map idea, remind me exactly of Motherload on XGen, with your permission I'd like to edit this map, you can keep all credit of course, I am a wiz at Multiboards and I have a system that would work well for the different upgrades, even adding the ability to upgrade all aspects, including Drillspeed.