Well the game doesn't have V-Sync, so the frame-rate is not capped at 60 fps. So you might get more or less than 60 fps and that is why the screen tearing appears. Thank you for testing my game!
Oh so it's on my end. Will try to tweak some settings and try again
Well you could force, I think, through nvidia control panel the v-sync. Or if you have amd, in the radeon settings.