Yup, there have been issues. When you say it doesn't load properly, was there a long wait time, or was it crashing on you? (Thanks for playing btw!)
Viewing post in SPIN-MECH FURY jam comments
I gave it a good 10 minutes to load and it never really did. Good chance that it's too big and Firefox curtails it to prevent the browser from sucking up too many resources, which isn't really something you can fix without really slimming down the game. Wouldn't hurt to prioritise the windows / linux builds over the web build post-jam.