The ratings are calculated by comparing pixels in the textures.
Basically it just checks how many pixels that are white in the template are correctly colored.
About your drawing: Thats definitely a 7/10. Looks real good. Well done! :D
Does it in turn also compare the non-white pixels to the template then? Just really curious because I think it's cool game design. Your game is easily one of my top favorites of the whole jam.
