When this game was originally slated for release, many Sonic fans (or more specifically, fans of the Sonic cartoon it was based off of) were ecstatic over it. I'll admit, I didn't have to many qualms over this game when it was being promoted. However, the developers claimed that they'd release it earlier than intended, which set off a major warning light for anyone not following the Boom hype.
Needless to say, their move bombed as severely as expected, and I mean as severe as Sonic 06. Only difference is that this game is actually WORSE than Sonic 06.
Graphics
The game suffers from PS2 grade graphics (which, considering what system this was released for is highly unacceptable.), choppy frame-rates, which really complicate the game during speed sections, especially when it comes to avoiding obstacles, and some glitches here and there. The most notable one being the Knuckles glitch which could be used to skip portions of the game.
Sound/Music
A saving grace for any Sonic game, even the bad ones mind you, is the soundtrack. Sonic 06 dominated in this category with music in a variety of genres. No such compliment could be given to Boom though, for it utilizes a generic and forgettable orchestra soundtrack.The sound effects are also very generic.
Acting
The acting is surprisingly abysmal. Many of the voices (save for Eggman) sound plain and stiff. The humor and dialogue is also nothing to go by. Every five seconds or so, each character states the obvious (such as their love for running and rings or when they jump on a bounce pad) or spewing out some of the crappiest jokes imaginable.
Story
The story deals with Sonic and co. fighting Eggman and accidentally freeing an ancient robotic snake known as Lyric, while attempting to hide from Metal Sonic. The rest of the plot deals with Sonic, Tails, Knuckles and Amy trying to stop him. Far too simple.
Gameplay
The gameplay consists of speed stages, and, throughout the entire game, boring combat stages that might as well be button mashers. It's about as lackluster as The Simpsons Wrestling.
Overall
This game is a pointless mess that has no redeeming qualities whatsoever. While games like Sonic 06 actually provide some comedic value with its flaws (along with some agreeable pros), this game is just bad in almost every way possible. Don't even bother.