Nice concept on the third one. The text is hard to read on second one is hard to read. The first one is cool too.
1st monotone maybe add color to the char to get her out of the bg 2nd cant tell what you layer it with but try make the layer darker so it shows better and erase a bit around the guy to make him show 3rd cant see anything just a bit of red
I like the first. ehhh on the second. Third looks cool, but i think it needs to be darker, or maybe have darker colors?