Thanks for answering my question, tried again this morning and it worked. I played it on bootcamp for a bit and it's a great game so thanks for making it.
I'm using a macbook on google chrome and when I press run game, the button goes away and becomes the background colour. This does not happen with other itch.io games. (P.S. This is less important, but could you by any chance say what engine you used to create the game?)
