Thank you for your feedback!
Indeed, I don’t have a real iPhone 6, or 6S, so I tried to guess a correct common resolution, but I clearly did it wrong

Regarding the multitasking, you’re right. I tried to implement the bare minimum to handle multitasking, but it was not working well, so I decided to remove the whole thing in this first commit. That being said, I’ll do my best to improve the situation.