You sure like grass! My general advice would be to try and make less irregular walls and grass patches. It makes it easier to navigate and such. Also passages that are only 1 tile wide doesnt really work in-game, so get rid of those! I think that if you give your maps some more attention to detail, you could improve them a lot :) Try to look at in-game maps as well and take clues from how they are designed - wall formations, gras formation etc.
And also, it's easier to give feedback if you post one map per post ;) It's better to create multiple posts then imo. Good luck with your future map designs!