Played this on Mac. My game has also been build with Godot, Safari doesn't work at all, but Firefox or Chrome will, but you need to be patient while it loads (after a few minutes).
I created an indestructible monster. While I was writing this comment I have had 17 attempts. Which is great, I love to win! It would have been great if you had to create multiple monsters and they die naturally after a few days. But hey, you made an interesting games in 48 hours, so good job!