The visuals are the Kenny Top Down Tank and the Kenny Urban kits. I was pretty amazed myself with how smoothly they worked together, especially considering that since the urban tileset is like 1/8 the size of the tank tileset, I don't think Kenny initially intended them to be used together.
I realized early on how tough the tanks were going to be at times so I really wanted to add a little extra to when you kill them. I forgot to add a special larger explosion for when you kill them, but it worked out pretty well in the end.
Glad you liked it! Tanks for playing!