We had multiple weapon types in mind with different tracking types (i.e. homing missiles, lasers, flamethrowers, etc.). Various parts of the boss rotating and looking at the player like the 2nd stage “eyes”. We planned for various power-ups and downs and paths having temporary modifiers. We literally didn’t have time to add the whole rogue-lite aspect of out initial idea. Besides that - the obvious like better music, vfx, UI and balance