Your right they arent that crappy. BUt they are the beggining stages of far better art. The concept is interesting and definatly needed explanation before I can feel free enough to gode out compliments and criticisim to a fuller exttent then the following.
I love the colors used on the last image, though the dark patern on the wall seems vastly out of place as if you simply kept a mistake there. What is causing the shadow? Your art isnt bad, and I am assuming you have just recently (Withing afew years) started drawing. Again not bad at all. Ofcourse proportion and depth/dimention are always in need of improvement at earlier stages of art so I wont point out the obvious too much.
All in all I must say I am interested in these pics...but what do they mean?