Is this run using a specific game version ? If not just beat the last level in the latest steam version and you will see that the boss only takes two hits without pushing the button with the extra truck.

Just played trough it, the boss now only takes 2 button pushes.

Hey i'm pretty new to this whole thing so excuse me if i'm pointing out something obvious.

I'm guessing the rule should be updated since the game now ends after the button is hit 2 times ?