If you Ctrol+A you will see all the objects that you added, and its showing that you're not using a lot of the space (primary in the corners) for diffs Normal and Hard (Insane and Extra are okay but i think it needs more attention to the corners). If you're gonna make rankable maps, you need to use the most of you screen, even for a low diff and a cut version. Examples:
https://cdn.discordapp.com/attachments/792458796936593468/914166207039537162/screenshot059.jpg
https://cdn.discordapp.com/attachments/792458796936593468/914166809199013928/screenshot060.jpg
enable custom colours by pressing f4 in edit and going to colours and checking ''enable custom colours'' you need to do this in this and in your future maps when you dont make own skin in the map i guess. make sure to enable it in all diffs