@Everybody: Thanks for the constructive feedback! I'm working on this alone It really helps to listen other people opinions.
Regards the shadows I have still to decide to implement them via the engine or hand draw them. Both approach have their pros and cons. Still figuring out.
@astraldata: Somethings like the barrels and the wooden crates are thing I made very rapidly as filler I plan to implement them further.
@Manupix: The truth is I didn't spent much time in the composition this is not going to be an actual level of the game, I just put it together in order to use this (early) tileset. Almost everything on screen is 32x32 tile (except for the larger sprites).
I will work on the bricks, anyway in real life it is quite rare to an uninterrupted wall of several square meters I plan to add more variation on the brick as well as columns, niches, openings etc. I will add supports for the pipes, it's a nice touch.
Thanks for the links! (for you to have a better view of the color counting I added the same scene without illumination)
@jahasaja My main concern is depth as well. At this stage the scene feel quite flat because i didn't decided yet how to implement the shadows yet. This can be a problem for the gameplay too since the lack of depth affects readability too (you should know at a glance if the player can pass through things or jump over them)
Here the unlit version of the scene more updates will follow, stay tuned!