Hi all, long time reader, first time poster.
I'm making a 2d side scrolling strategy game in the same vein as Armor Alley. The engine is mostly complete, now all I have left to do is the game art.
I've made some stuff as you can see so far, but I think it could be executed a bit better Would you folks mind giving me some feedback?
The old tank isn't used anymore, I just keep it in there in case I want to edit it to become something else.

Originally the sprites were drawn on a black background, but my friend suggested we switch to something lighter so we wouldn't make sprites that turn out too dark or miss important details in lighting and shading. I think he was right, any opinions?