[turnsout]

On Dvorak, WASD never works; game designers should use arrow keys or find a lower-level way to access key events that doesn't depend on the software layout.

[Aloisius]

Usually game developers use keyboard scancodes which are layout agnostic rather than the character generated when pressing a key, so it works on dvorak, AZERTY, etc.

I don't know if Scratch supports them though. Seems like it would given it's game focus.

[turnsout]

Whatever the reason, in this case, it's broken

[mrheosuper]

yeah it's broken for like 0.000001% of user

[kbelder]

Well, WASD also is slightly broken for most left-handers, at least for games that assume one hand is on WASD and the other on the mouse.