Since earlier today I have made a fair amount of progress. You can upgrade the ship (Engines, Weapons, Shields, and Cargo space) and each upgrade makes a noticeable difference. There are now nebula’s that spawn. I have started to add the baddies that I want. The Drone/Scout triggers an invasion, you lose (if you die) or if you defeat the waves you win and set a high score.
Next add in combat, so you take damage, and can deal damage. Then Sound/music/menus/options, and hopefully a online highscore table.