Game mechanics (swing the bionic arm) are a bit trycky at first since there aren't so many games that focus on this but once you learn, the game feels so smooth and rewarding... One of the few games I know that is meant to be played on it's hardest difficulty level so you can get the feel of old school hazarous platforming games.
Graphically doesn't stand out but if you pay attention to detail (closer objects blurs as you focus your sight on the one far way and the same if you do the contray... the water effects at the forest...) you can discover fine stuff there.
This game got bashed unfairly but doesn't desevere less than a score of 7. It's not a game for everyone but has some of the smartest moves I've seen lately in the industry:
Collectible items are reasonably big and bright (neon) colored so are easy to find in most cases... but hard to get sometimes, since this can be considered a platformer (with shooting in it) Oh, and they'll unlock concept art so serves a purpose.
There's also tasks to do ingame such as killing 3 enemies using shotgun while swinging and such. The kind of stuff that grants you an achievement. You got killed, restat at the checkpoint and then forgive about it since it's on your gamerscore. ERROR. Those unlock upgrades for your armor and weapons (in a similar way that perks works for The Saboteur) so you'll want to get it done in the same saved game not just for your gamerscore but to improbe your chances to survive later in the game. Clever!
IMHO you'll have a hard time trying to get more for your money that this title throws at you at its bargain price.