Hello and welcome to PSG. Thanks for sharing your
Out of Bounds composite.
Very nice!
There are some selection issues where you missed some stuff including the area around and within the TV screen and around the border of the whole image.
The
composition/framing is off since you cut off the space ship and part of the TV which diminishes the overall effect. The canvas is just too busy and full.
The windows and engines of the spaceship could use some outer glow to make them pop. And as Eggy stated, there's no shadow being produced by the ship on the tables surface.
If you need any help or have any questions please don't hesitate to ask. Keep up the great effort and practice, practice, practice!