Personally I basically never download games anymore. It's a huge hassle compared to just clicking play on the page. And in a jam environment when there's many other things to play, you can't expect the player to troubleshoot for you.
Ok, just know that in the downloadable version the movement is responsive and it doesn't lag at all. We only uploaded a browser Version for people who do not want to download games but because it's a 3D game it is pretty unstable.
