I've already try to play it on battery mode and performance mode. Even when plugged in, the lag keeps occur. I dunno again man.
Can you please either post here or e-mail to buru@buruthebull.com the log file? You can find it here if you use the Itch Desktop App: C:\Users\<YOURUSERNAMEHERE>\AppData\Roaming\itch\apps\rivencliff-sunbath\RivencliffSunbath
Or just inside the folder where you extracted the game files if you downloaded the .zip file.