Woot, finally done!
The extra bells and whistles I did:
- secondary attack with AoE-effect rockets (press shift again to detonate a rocket in-flight)
- third enemy type (tough, moves from bottom to top, leaves insta-kill mines behind)
- powerups - extra health and rocket ammo
- random cloud generator
- nice visuals and audio (from Unity Asset Store and some very old games)
I’d like to get back to it sometime and add:
- bosses
- 2-3 more enemy types
- more powerups
- more secondary attack options