Just bought The 2D Adventures of Rotating Octopus Character.
Only played it for a brief while but I can already see why it is getting such positive reviews! It has an interesting puzzle mechanic. Manipulating the Octopus quickly while jumping between platforms takes some getting used to but I can see how you can pull of some amazing trick stunts once you get the hang of it! :-)
The animation of the Octopus is liquid smooth, at least on the first few levels that I've played so far.