The Breakall Drillbot has other uses besides breaking through solid walls. There are sockets running along on rails -- if you drill upwards into these, you'll hold onto them for as long as the drill keeps running. There are also hidden jacks that you can plug your drill into. These come in handy to open giant roller doors that block your path. The one I encountered also needed to be closed again to remove the counterweight from blocking my path. The drill can also be used to plough into enemies for as long as it keeps rotating. It can even be used to deflect bullets and missiles, but you don't want to run into the missiles because they'll explode instead of deflect!
There is also a cool mini-boss encounter before the demo is over. There is a fairly large pig-like tank which keeps shooting missiles straight at you. The key to success is to wait for the missiles to come out, then plug your drill straight into the missile hatch -- not as easy as it sounds, as the missiles come at you thick and fast! Once the tank is defeated, you'll finish the level and be picked up by your fellow thieves. You'll also see a cutscene that shows your Drillbot completely destroyed. Your handyman repairs it for you, but wouldn't you know it, he can't repair those extra gears you found, so you'll have to start the next level with one gear again.
Screw Breaker is a fantastic game with a really clever game mechanic. It's a combination of action, platforming, and puzzle, and the cart on the show floor even has built-in rumble! Here's hoping that it gets released, because it's a really fun little game that's easy to pick up and play.