I think the textures are good, but the level is too simple...

It´s simple.
However it´s better to make simple maps when you start mapping, rather than making pointlessly complicated stuff imho :)
Item placement looks reasonable, this should work as intended.

The only downside imho, is that the walls around are all the same height, looks very cubish..
Also those many trims on the walls look a little too busy, especially on the upper segment.

yes, its really simple, but this was my first map with 'direction' and a pre-planned layout. hopefully I can build on this now :D