test your ability to eyeball angles, points and distances.
I found this via Core77 and gave the game a shot, its actually pretty fun. My score was a 3.68, gonna give it another shot in a bit (with a real mouse). Let me know how you guys do?
Also check out the rest of this guys site, apparently he's a big woodworking buff and he has soome great tutorials on joints and fun woodworking projects available.