Andross (Boss)

Andross is the 5th Boss in Act I, and the second form (or phase) of the Operation Boss.

Tactics
This battle isn't too complicated but can be a little tricky to beat. When you shoot at a spike, they change direction from horizontal to vertical. As Andross' head moves back and forth across the screen, any spikes that you have made go vertical and hit him, do damage. Do this enough times and you have yourself a dead boss.