I'm gonna go ahead and request you remove/ater on of the aspects of it, either remove his ability to detect metal, or the push-pull thing. alternatively, make it so he can sense iron, but only in a broad sense, such as approximate distance and vague direction
In addition, make it so he can only use it to move himself if it weighs at least as much as he does, for balancing purposes. feel free to have him railgun those coin things, though.
Flair for the dramatic is great and all, but you're going way the hell overboard.
He's 17 and attending a school where he wil be face-to-face wit monsters hellbent on wiping out his entire species, I think that's plenty reckless.