Launch Object

Another Question ..... how can i set the Cannons Position to the Mousepointer ? So that i can aim with the Mouse.

Set position to x/y Mouse don't work.

Now i have tried with "Advanced Direction"

always set angle to direction x/y Cannon, x/y Mouse.
That works.

But how can i set the Direction of the Canonball to the Mouse ?

Create a "mouse" object, make it invisible at start of frame.
Add the following actions:
Always>> Set mouse object X position to XMouse.
Always>> Set mouse object Y position to YMouse.
Then use:
Cannonball>> Look at (0,0) from "mouse"