The best way to report a bug is to contact us directly on firstname.lastname@example.org. Please make sure to specify as much information as possible so that we can identify and fix the issue promptly.
For example: "I was playing PolyRacer on my Mac while using Safari with my Samsung Galaxy 5. I could not see the whole screen. I tried restarting several times but it still didn't work. I have included a screenshot featuring the error."