Hello!
First of all: thank you for your feed back!
Second: to be honest I didn't think about the 4k monitors. 😅 On smaller resolutions it should be fine because my settings for the resolution were full HD. And I've set the pixel perfect camera's settings to use that as a reference, so I understand why it did happen.
I'll look around and see hos can I fix that.
I hope that then you can enjoy my game.