You can also press "X" to open the menu, but also, that's weird. What version of the game are you playing? The menu's fine on my browser and my PC download, I wanna know what the deal is with this.
im playing from browser maybe its just a small bug but im not sure
i have also pressed x many times i went through every button on my keyboard but was unable to open the menu
??? That is. Weird. Honestly, see it you can play a download build of the game because this just seems like an engine compatibility issue.