Vez'Nan may be the final boss, and there may be no speed up, and Vez'Nan might make absolutely horrible jokes... But there's entertainment! :D "All your base are belong to us!"
1. Nerf those bloody asteroids- Reduce speed, and bounce
2. Make the bomb's explosion direction more consistent and predictable
3. Get different types of guns- e.g. Machinegun, cannon, spray
4. Get health bar for enemies.
5. Enemies need animations e.g. Picking noses, farting, looking at you
Otherwise, really great and full-of-potential game.