@Georgios-Christopoulos These look really good and have a polished style to them. Your storytelling is very good. I personally like the words. It gives them a comic book feel more than a children's book, which is fitting for your style. Its also good practice for knowing where you would leave room for them if you were illustrating a comic.
One critique I would give is to vary your lines more. You have really thick lines for almost everything except for the inside details. Try using finer lines for receding objects like the trees. It will really help you create 3-D space in your work. Use the bold lines only for the closest objects. If all the lines are the same it can get overwhelming and you don't know where to look. Have you done @Jake-Parker 's inking 2.0 class? It is very helpful for inking lines and linework in general.