ha , well I dont know really, its pretty simple code ,basic unity / export the only thing I can think off would be that I have the movement code (basically a simple spring with damping) in the update function (called every frame) with deltatime while maybe the more sluggish feeling projects put it in fixed update because its simpler (no time to consider) ? Fixed is only called at a fixed 60 hz by default I believe, then again I dont even know how many fps the game gets to playing in the browser.