Check the back of your box vs. the back of this one. (UPC for example: 083717150114)
[img width=540 height=379]http://www.rfgeneration.com/images/games/U-044/bb/U-044-S-07130-A.jpg[/img]
Also check the part number listed on the back of your box versus the part numbers on your manual and cart.(The box may have additional -1 or something similair at the en of the number)
It might be you have a unique box art and normal cart/manual.
Cool find
Loved that game growing up.