Submitted by: David K
Time is Money:
Each second you operate your mining machinery costs some money, so don't
dilly dally on the levels. Grab extra gold to repair or improve your pipes,
but you only have to clear all the diamonds to finish the level.
Grab boulders when you see them and then press the Control Key to drop them
in the path of oncoming monsters. Boulders will block certain key passages
allowing you to operate more effectively - this is a key trick for beating
the higher levels!.