Thank you TheFrog for your feedback. This is exactly the kind of feedback I wanted so thank you!
You make some good points so I am going to note these down and see where I can improve.
The grass having gaps in them was to try to simulate a kind of field initally but maybe that doesn't work. I did have trouble with the trees in terms of discerning them from the background.
I did do some little islands in my other screenshots but I think they could be better to show how the pack can be used and what kind of games people could make, so again something I will think on. Infact I think the screenshots on my free pack are slightly better. I got tired doing them at the time.
I was also thinking of making a small browser program where you can draw the tiles, like a little game, just to show them off more. It would give people a clearer view on how they'd look in a game.
Like I said above this is the kind of feedback I was looking for with enough depth for me to work on stuff and constructive! So thank you very much for taking the time!
KyleD