I just ran the game on my laptop as well as another PC, and it ran fine. The main menu transitioning to the main scene does take a while to load due to the stuff that is loading in, and I haven't implemented a loading screen for that.
'Not being able to exit with close window...' that is interesting though. I think you should be able to do so with the escape key, it is bound to quit. Thanks so much for all the feedback, I'll look into it at the end of the jam! I played your game too, it was very cool! <3