i did some changes to game loop that should cap the update rate of the game and slow it down
i tried to test on a pc with better specs but on every machine i always get only 60 fps, so maybe this will work for you and maybe not ;))))
oh wow it worked huh
the game is made in my own engine that i built with javascript
you can see the source code here if youre curious https://github.com/pebonius/shadow-of-rummaroe