The AI needs all the advantage it can get; even with the AI at 5x the income I'm still at an even footing. High armor enemies and the tombstone are really good at knocking them out.
3/5. Wait, why do I get two lives just by simply killing a red ship? I had about 11 lives at the end, without having used a single special weapon, only to lose all 11 of them when a fast spaceship hit the floor. Definitely has lots of potential.