I have an Android tablet. So I played this last year and have had Episode 2 (THD) for a while now. Episode 2 is quite a lot better (in terms of graphics).
It's still great for what it is: Sonic. If you can't get Episode 2, it is pretty worthwhile.
And I still wonder how he does it...
But if you get all the clues right this is correct, but I really wanted jetpack joyride
Any clue when that comes out?