Changing game idea!

So after getting my main mechanics up and playing with it for a while and... I didn't like it. Since it's still relatively early, I decided to change ideas. After laying bed in a while and staring at the roof, the idea I came up with is top-down shooter. What's the twist though? Instead of shooting bullets, you and the enemies shoot walls! Is this going to work? No idea until I try out, but due to the time left, I'll be commiting to this idea wherever it leads.