[Puzzle] Children of Morta - Solution posted

I have not done a puzzle for half a year, so here is a little one for a game rather popular on the community's wishlist.

I have no clue if the puzzle is too simple or too hard. I might add more hints after a week.
Edit: 42 entries after nearly 3 days, seems the puzzle is not too hard. All "hints" you need are in the comments.

Enjoy & have a nice day.

Solution:
First picture: RGB
Car pictures: red car first, then green, then blue one, because of RGB
Numbers: There are characters in the description of the images on imgur. You have to sort the characters by red, gree, blue 43, so switch those, blue 5 to get the giveaway code.

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