Thank you two for the feedback! It was an idea, but obviously a bad one. I’m going to create a new system and this time I will try to make more “traditional” controls as you already said.
Concerning the loading screen, I have to mention that I’m always loading things (images, etc.) before a new screen (Otherwise a loading screen won’t make any sense) - also before the level selection screen. When you enter a loaded screen again, the loading screen won’t appear. I agree with you, the loading screen before the level selection is not needed - e.g. I could load these few images in the beginning as well. I will try to create a smoother loading system, because this current system is probably annoying.
But yes, thank you again for your honest feedback