I had a very hard time playing the game mostly because i really dont know how to fly a plane i dont know what those buttons do. i suggest that you should add a pop up box that shows instruction on how to start the plane, the idea was really cool especially the zombies trying to stop you.
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There is an instruction in the comments down below if you are interested in retrying. But you are correct. It is unreasonable to expect you to figure it all out on you own (my first attempt starting a plane probably went similar to yours). What do you think, would achievements for turning on the battery etc. be enough hints for you?