The computer screen I can forgive, but if they author genuinely doesn’t have access to modern image generation tools then they could have at least loaded that image up in GIMP, Paint.NET or even just MS Paint, and added the text themselves.
I sympathize with the motivations behind it, but it does look cruddy and cheapens the end result.
The "Oomerd" button is probably the debugger by the sound of it?
Modern image generation models can handle text fine. Or the author could have left those artefacts blank and added the text themselves in “post production”