My stuff :D

[Chris2Balls [:B]]

Here's yours:

Here's mine:

Made the higher parts lighter to give an impression of height, and tried to make the box fit to the surroundings. I also tried to make the water look like it had waves. I hope it helps!


Regarding the anti-tank sprite: there's a staircase effect on the cannon, which I recommend you try and get rid of, since it's a rather displeasing effect.