I haven't a buccan clue what is going on. It's a curious mish-mash of a jet fighter and space ship whizz-bang shoot 'em up arcade. This really is a cheapy in fairly expensive wolf's clothing. Your Buccaneer has up and down but no lateral movement during the early screens and a very slow fire response. But don't worry, the aliens are so moronic that often you can stay where you are and top 'em as they queue up. The quicker you blast, the quicker you move through the remarkably similar screens. Even the most amateur of arcaders will have been this way before.
The Buccaneer is all but redundant as a modern day fighting plane - as is this game compared to many excellent alternatives.