Main instructions are in the controls menu. Tips/other instructions: Shoot through the opening, shooting the blue shields won't do anything. Try to shoot bombs as they do much more damage. Bombs have a time interval after each shot and it changes each level. Use asteroids to your advantage as they damage the monster's shields. Big asteroids split when you shoot them. Grab space juice whenever you see them, they heal you back to full health. They're purple and with a heart in the middle. You can choose your own ship in the menu. Stay away from monster shields as they teleport you.
Sound FX and inspiration: mrLman 's Super Alien Assault v1.0 Griffpatch's Lemanoid (took inspiration from his game to make asteroids and SFX). Inspiration from the base model of the game from a course on Udemy