It’s just red (i.e it’s like gray scale except the gray is shades of red) or black (i.e you can’t see anything) on my android phone. For the rendering of the game. The hud is visible (well, it’s too small for anyone over 45 to read but it’s there at least)
That said your list of phones says it ‘runs ok’ on the android phone I have (nexus 5x) From which it’s not clear whether that’s because the phone is not good enough, or your code is unoptimised and eventually you hope to improve it on these phones?
Either way, if you want the beta version testing you’d be better giving codes out, because charging twice the money Netflix charge per month and asking us to test your code is difficult to swallow.