Hop from square to square in the direction of the arrow. Can jump as many squares as you like, but MUST land on an arrow of the opposite color.
The object is to get to the exit, spelling out the answer as you go.
There aren't really any good hints for this one. Just try combinations until you get something that makes sense. And you'll end up with this.
Follow the cyan trail from START to EXIT, and you'll see that the trail spells out SHMOOBALLCANNON.