I learned today that I definitely don't know how to start a plane. A couple of the buttons were really small and frustrating to press, though maybe its because I'm not a pilot. The t-posing zombies made me chuckle :).
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Did you use right click + scroll wheel to zoom? Again one of the things I probably didn't explain too well.
On one hand a tutorial section on game controls might have helped, but on the other hand it feels a little weird making a tutorial for a game that requires you to figure it out on your own. That's a cursed problem right there.