@nyrrylcadiz Very late to this, but first I wanted to say that I really like the piece you did with the flying dog 
Going back to your original concepts, I think that 1 had the best read. I also liked 3 as I thought it was a nice snapshot into a bigger story.
I don't think that you needed to expand the frame to include the other objects and monsters in no.1, as it feels like there is too much story and the main concept has been lost somewhat.
the new sketch of the kid been told off by his parents is also very promising, but perhaps it would work better in portrait rather than landscape as the composition is getting divided up into quarters.
In regards to the cat and mice one, i'm not exactly sure what the story is about. On first read it kinda reminded me of the crazy cat lady from the simpsons who throws cats at the children. I don't know if you decided to veer away from the competition title (which is fine if you have a great concept) but is the cat good or bad and which character is misunderstood? Also why is the candy/chocolate she is holding in the shape of mice? Is it following the same story of hansel and gretel or is the cat witch (?) actually nice and the mice just got shocked and decided to run away once they saw the chocolate mice.
I love the design you did of the house, but it has much more detail than the foreground elements which I feel is causing issues with the composition. I would much rather see the characters much closer to the house and interacting with it in some way as it seems a shame to be just used as a background object.
In regards to the lighting, it depends on what is the story you are trying to tell. I don't think that either lighting scheme helps narrate the story and I would go back to working on it in black and white to do a few value studies first, rather than working on the details before the main idea has been told.
I hope this critique didn't come off as super negative. I think you have the skill set to get a great piece done and it feels like you are spending a lot of time working on the details before the foundation has been built.