Think I may have just fried my brand new 2.4 GHz system

Long story short it due to my 1, haste 2 ham fistedness I have either reversed the polarity or shorted the power leads, end result was smoke from board horrid smell now left track motor run constanly regardless of in put.
Here's a photo of what it looks like now, is this salvageable or have I just blown 40 quid

The small copper strip appears to have broken, is this a fuse of some sort?
Cheers
Jon