Are you looking for an isometric kinda thing? I can make a 3D model and render it as pixel art, then share both with you.
Sorry, should have specified. I'm wondering if you could do some top-down tank and turret. If at all possible, have it neon or maybe even futuristic? I'm going for Tron inspired.
I'd imagine it'd only take about 15mins but I'm not artistic.
Here's a sample of the walls I've made:
A tank to suit would be great and I'd love you forever! <3
*cough* a missile or something wouldn't go a miss too *cough*
I'd gladly pay you for your service too if need be.