Generate "low level" mouse movement events

Unfortunately I don't have another example currently, but I'll watch out for one.

In the meantime, could you have a look into your code and see whether it sets the delta fields or not as suggested in Cocoa: How to send proper mouse delta events?, i.e. like

event = CGEventCreateMouseEvent(None, kCGEventMouseMoved, (x, y), 0)
    CGEventSetIntegerValueField(event, kCGMouseEventDeltaX, delta_x)
    CGEventSetIntegerValueField(event, kCGMouseEventDeltaY, delta_y)
    return CGEventPost(kCGHIDEventTap, event)

If Keyboard Maestro already sets them, the cause must be different, but if it doesn't, here might be an opportunity to make it more compatible with some games.

Thank you @peternlewis!