The boss in stage 4 is hard even with full upgrade. He can only be hurt by opening treasure chests. Also later in the stage there are minions going for the base, so it may not be a good strategy trading village's health for hero's health.
Stuck in a loop with only Bill surviving, repeatedly fixing engine and got destroyed. Tried making him go panic but he still recovers, leading to no ending. Learnt that turn duration shd be 20s, story of another Alex, oxygen issue.
The "freeze" power up should also slow down time count. Taking the power-up often makes it impossible to finish the level on time, & hence missing the third star.
Got the ending without holding the button.
I don't see any girl though, just a sign telling me i can "toggle whether she follow with C". But nothing happens by pressing C.
Finally found the trophy in level12 with faith and persistence!
It is located on your way to the valve where you need to press down against a plant to enter the secret path.
 "Magirune"){kind=icon}
 "Ante Hero"){kind=icon}
 "The Power Of What"){kind=icon}
 "s_135"){kind=icon}
 "Space Incident"){kind=icon}
 "Barons Gate 2"){kind=icon}
 "Rogue Soul 2"){kind=icon}
 "Purrmageddon"){kind=icon}
 "Good Morning and Die"){kind=icon}
 "Endless Boss Fight"){kind=icon}
 "Stop The Clock"){kind=icon}
 "Only One Chance"){kind=icon}
 "Hero in the Ocean"){kind=icon}
 "Until Dawn"){kind=icon}
 "Monty's Moon"){kind=icon}
 "Smooch Chase"){kind=icon}
 "Don't Escape"){kind=icon}
 "Another Small Favor"){kind=icon}
Did you see a message that story can't be continued with died Jackie before some key moment? You need to restart the game in this case.