ah i see what you mean but i like it how it is.....maybe i'll shade the rocket a bit but mostly i feel done with this  i shaded the rocket a little bit and now i think it's like i wanted it^^

Quite good, nice colors.

Cast shadows would add a lot of depth: on the floor below the chair and bench and cables; on the wall below the screen, shelves and 'pods'.

The cables would also need a few highlights, and some anti-aliasing as they appear jaggy.

The green rocket (?) would need a shading upgrade, with light source from above to be consistent.

Then maybe a little more contrast and / or color to the floor!

FANTASTICA ESTA PIEZA :)