Only for the duration the mouse is off-screen, though?
I was able to freeze it proper. I think the same thing happens when you click into another tab and then return to the game though? Might be related.
Hmm, interesting; so far I've only managed to make the game temporarily freeze (with a click on the game window unfreezing). I 100% wouldn't be surprised of an actual freeze/crash existing, mind you, haha
Reproduced 100% on itch.io page under Chrome. Click on card, then click outside embedded window. Clicking inside does not unfreeze.
Ah, thanks for the reproduction steps! Got it to happen now. Hopefully something can be done about this.