Speed Up! Can't dodge anything without speed!

Missiles! It's nice to be able to shoot some things that are on the ground.

Double! It's nice to shoot some things that are above you!

Lasers, 'cause I'm dumb!

Options, because they increase the range of what I can shoot!

One of the power-ups from another Gradius game because you couldn't remember them!

The Konami Code, obviously.