Actually, the arrow keys can substitute for the WASD keys.

WASD is just easier to use one-handed with the spacebar.

Just turn off Dvorak while playing the game.

Who says that dvorak was "turned on" to begin with? Maybe the solution is turn on qwerty while playing the game.

Because the standard is QWERTY.

Yet a lot of people use dvorak. Or QWERTZ or AZERTY.