�why is this?
The 1,469 should be 0 but i changed it by hand so it was innacurate. Oh yeah and remember in construct 0 angle means Right (thats why i rotated your lazer beam), so when i change the bullet angle in events to 270 it direction is changed to Up which determine where bullet will go.
�what is that "central square" wich is at the left in the bullet and in the center in the "enemy ship"? and �how can i change it and for what?
Its hot-spot, what it does its the center of sprite in simple speaking so if your sprite will be rotated it will have hot-spot as your center of sprite. You can change hot-spot in picture editing, its that red cross below elipse tool.
And yeah in that enemy ship change his Angle rotation to "No rotation" or if you want him to change his direction properly just rotate him by -90 degrees