I have noticed while playing the other games that the browser seems kinda sluggish. It was a last minute decision to publish as html 5 instead of windows and I probably should have tested it a bit more. Thanks for checking it out.
I had the same thing and fixed it. If you used the Unity engine and change transform.position over time, make your transform position change depending on the Time.deltaTime and put it in the Update, not FixedUpdate, that worked for me