Hello! Thanks for your feedback!
I considered the possibility of using both external controllers and the virtual controller together (there is an use case in my demo video ;), so I didn’t directly disable it. If you prefer not to see the overlay, you can go to the virtual controller page, tap the […] in the top right corner, select "Edit Buttons", and then disable the buttons you don’t want to be displayed
As I was typing this, I realized you made a good point! The […] button can also cause screen burn-in. I’ll add a feature in a future version that lets this button disappear after time