Bubblegym: tilt-controlled game for new Powerbooks

Balooba Software has announced a nifty little donationware game called Bubblegym, the first (that I've heard of) tilt-controlled computer game for Powerbooks. Scott covered
the low-down on the new Powerbooks' motion sensor the other day, and ever since then I've been envisioning a Powerbook snow-globe program.  Bubblegym would seem to be the first game to capitalize on this new interface. If somebody has a new Powerbook, download this sucker and give it a try, then report back here in the comments. That's an order, soldier!

While Bubblegym is not a pinball game, if it works nicely, I really hope that it starts a whole pinball-emulator craze on the Mac portable platform. Can't you just imagine blasting Pinball Wizard in iTunes while gently nudging your Powerbook to move that virtual ball a little closer to the multi-ball trigger? 
Careful not to tilt!