When it comes down to it, Size Matters doesn't really matter at all.
In the beginning everything seems fine: It looks good, the opening cutscene gives you a healthy dose of humor, and the controls seem to respond well. But after playing for a couple of hours it actually starts to feel too much like work; it's as if someone suddenly takes all of the fun out of it and turns it into a essay on how not to make a game.
What happens is that the problems develop slowly, sneak up on you, and bite you on the backside once you're lulled into a false sense of security. It's not such a big deal that you have limited camera control until you start facing tougher enemies in tighter spaces, and then you're screwed. Unable to spin the camera in a place where you can follow the action, you're relegated to dropping Agents of Dread (little robots that follow you and attack at your enemies) and running around like a chicken with you head cut off. If you're lucky, you'll manage to avoid their attacks long enough that the little guys will do your work for you; if you're unlucky, they'll blast you back to last checkpoint.
And this is where all of the difficulty and challenge comes from. If you could position the camera well enough to see what the hell you're shooting at, this one would be an absolute keeper. Instead, the poor camera accentuates every other problem in the game, and leaves you with a title that's almost easier to play blindfolded than with your eyes open. All it needs is controls in Braille and it would be all set.
As a result of all this, the later levels become a real chore and other minor problems are accentuated as a result. For instance, the fact that there's a good distance between checkpoints, or that one of the last boss battles is preceded by five minutes of garbage gameplay, isn't so bothersome until you start getting sent back repeatedly because the camera won't behave. It also becomes apparent that High Impact Games had some trouble working with the hardware. The sound cuts out from time to time, and the controls will suddenly stop working for no apparent reason. There are more than a couple of times that a missed jump comes as a result of a button press not registering, and the hiccups are very blatant when they occur.
This is unfortunate, because Size Matters' finer qualities are overshadowed by all of this screwing around. It has a fantastic and hilarious storyline, the graphics are well done, and it has some rather ingenious level design and gameplay ideas that would have been so much better had we been able to see them properly. As it stands, part of these efforts are ruined by a by the frustrating inability to look around your environment, which leaves the game feeling average at when it's at its best, and absolutely screwed up when it's at its worst.
The only gamers I can recommend this one for are fans of the Ratchet and Clank series, those that can handle a good platformer with a bad camera, and the blind. Everyone else should look elsewhere for their platforming kicks, as Size Matters doesn't really matter at all.