If you install AutoHotKey or have it installed here's a script to rebind the Esc key


It will only change the key in the game, nowhere else so you can leave it running always.
It's set for the default pause menu key but you can change it to whatever you like by changing 0 down and 0 up to (key) down and (key) up.


It's important to note that in fullscreen there's no other way to exit the game. You'll have to Alt+F4 to quit the game.