I solved the first level - after dying some 90 times. The second level is even cooler. The circles are psychedelic, wobbly, and Dali-esque. See the second image. I have not completed the second level, though I've died over 200 times. Why? Because the game doesn't save your progress.
I did start the 3rd level. Imagine the inside of one of the circles being completely filled with spikes. (Sorry, I don't have an image for that.) Those spikes will fade on off for about 3 seconds. So you must time your transferring.
oO costs $1.99 on the App Store and $1.97 on Google Play. Not sure if this happens all the time. If it does, then maybe we should all switch to Google Play so we can save 2 cents for all of these games. The game came out in April, but I just found out about it recently via Apps Gone Free. oO was free for a days. Nice job Maciej.