Lap your way to the end of the level avoiding all the dangers whilst collecting as many fi.
Thanks onkelarie, I can see why you'd expect that as it actually makes more sense, , but no, hitting the balloon triggers the dynamite, I needed an obstacle on the top half of the game but in an open sea level there aren't many over head things. I could have spent a lot more time on the game but the game really is just to preview the assets on my asset store.