Simple concept which I think you can make a lot more interesting if you experiment with different ways to destroy the bombs/rockets.The art style needs to become more consistent. The village and background are drawn in a very nice style and the bombs/rockets should be a little closer to that style while still maintaining some contrast. my last tip is to work on feedback; what happens when i destroy a bomb? there should be more feedback in visuals and sound to make the game more satisfying.
Keep it up!