I desperately want a rip of the Drill Land soundtrack.
As far as the series, though, I have to echo sasimirobot's comments (in my case, based on the GBA driller titles). It looks like the game is fun, but some element of the fun logic just escapes me after the first few hundred meters down. All of the pieces start falling from, like, minutes ago, trapping me and usually blowing away all of my lives before I can even hope to accomplish an entire stage.
I can understand being careful what to drill and what not to drill, but after going down a certain depth I just can't remember what it looks like past the top of the screen.
(Waiting for somebody to give the full Drill Land sales pitch)