They have a Genesis-style sound to them, especially with the pistol-like drums, which doesn't sound great for the most part. Despite being composed by longtime Sonic composer Jun Senoue, the music doesn't sound as good as Sonic 1, 2, CD(both the American and Japanese soundtracks), or 3 & Knuckles.The worst part is that the game sometimes plays itself, with lots of speed boosters and springs everywhere for no reason, even when it's something as basic as running to the right.
This is because Dimps basically reused the same physics engine from Sonic Rush, which had a boost feature, whereas this game doesn't have anything of the sort, making the physics completely broken.