Long time fan of the site Mrs. Trawets submitted a link to a very addicting, and I found it to be very tricky, flash game called Twizzle.
The rules are simple enough: push your sphere to each level’s outermost orbit. Some orbits won’t let you move freely though, and while some of the elements you’ll encounter throughout the game will help you, others might set you back. You really need to be able to think a few step ahead.
You can click the screenshot to view it’s full size, or just head on over to www.bobblebrook.com to play for yourself.