Unsatisfactory, as the scenario that many technical flaws encountered.

Simultaneous release with 3DS episode (Shattered Crystal / Cristal Broken), this cake is unconvincing because the levels keep coming without enthusiasm, I often had the unpleasant sensation to redo the same loop 3 levels each new environment through.

In this game, the rings have little importance (strange for a Sonic title stamped), because when the counter reaches zero, one in twenty recovers automatically if a lot of standard robotic parts (chests, enemies defeated) ... which often occurs when enchainer by 5 enemies who have eyes for you (solo mode) or if you have the misfortune to fall into the water (it is far time of Labyrinth Zone where he was not afraid to get wet).

The replicas of each of our three companions are informal but extremely bland (a banality, the non-existent humor), as is the number of NPCs pokey present within the levels that exist only for achievements quests.

In the end, it ended up tired when I reached half the game, the display bugs / textures without reinforcement causing glitches here and there, and the many jerks that occur for no apparent reason, being responsible burdening the addition. BigRedButton and Sega, an association that has given birth to a product unsatisfactory, well short of what I expected ... and obviously I'm not the only one to think.