Wave 7, 9:30 minutes. Pretty fun. I like the upgrades. Definitely it's always harder to beat the mobs than your clone. The narrative is enjoyable. I like the music too.
Friendly advice: on the upgrade that says "shoot periodically in all directions OR constantly shoot in a sphere", DON'T CHOOSE the 2nd option. It will be impossible to battle your clone. It's better for you ig, but also too hard to beat the clone.