Two things I'd suggest trying:
You've probably already done so, but try disabling all antialiasing and motion blur to see if that makes any difference. Specifically, I think there might be an issue with MSAA and Intel HD graphics, but I haven't looked into it too deeply.
I suspect this issue might be occurring when the game runs using the Intel graphics and not the Nvidia GPU. Can you try to make sure you're running the game with the Nvidia and see if that changes anything? Unity games have a tendency to default to integrated graphics if you let it auto-select.
From the Nvidia Control Panel (you should be able to get there by right-clicking on your desktop and then selecting it unless you've disabled that option), select "Manage 3D Settings" in the list on the left, and then set the preferred graphics processor option to Nvidia if it's currently on auto-select.
Alternatively, you can also click Desktop on the top menu bar and then check "Add 'Run with graphics processor' to Context Menu", then you can right-click on driftstage.exe and select to run with the Nvidia GPU.