I come across a problem a lot. Randomly it stalls my engine like going through the dark clouds, but I did not hit any. It also does it on the ground, during a launch.
I have come across a glitch when you face the two rats, then after you kill them you have to go through the door at the top. I cant get to that door due to an invisible wall. So I cant progress with the story. It's done that to me three times now.
 "Into Space 2"){kind=icon}
 "Zombotron 2"){kind=icon}
 "Glean"){kind=icon}
 "Greedy Ghouls"){kind=icon}
 "Musaic Box"){kind=icon}
 "Soul Tax"){kind=icon}
 "Civilizations Wars"){kind=icon}
 "Heavy Weapons"){kind=icon}
 "Endless Zombie Rampage 2"){kind=icon}
 "StormWinds: The Lost Campaigns"){kind=icon}
 "The Majesty of Colors"){kind=icon}