I can see what you were going for with this one, and I think it's a decent concept at least. I admit I don't really play deck-building games, and I'm not familiar with Battle City. But the art is great, and it's neat seeing the characters path through the city as buildings get destroyed.
If you enjoyed working on the game I would recommend trying to finish it, it seems like you got a decent chunk of the work done.
Sucks you couldn't finish it for the jam, but this is a strong start on the art and concept front. Good job!