Really sorry about that! Not sure why that is - it's working fine on my laptop (in Chrome and Firefox), my tablet, and my phone.
Could you tell me more about your setup? What hardware, browser, etc.?
Hi again. Sorry for the delay in replying - I was away for New Year's.
I'm still not sure why this is working. I've asked a few people with varying setups to try playing the game, and it works for them. I've now included a proper downloadable version on the game's page. Hopefully that works - if not, then I'm really sorry, and I'll make sure to look into it further during a bugfixing window I've got scheduled later in development.