Not so great
Too many times did it seem like my cannon was hitting tanks or soldiers and it just didn't. Need to fix that so even if I shoot past the enemies it will still hit them if they are in the line of fire.
There wasn't enough levels to enjoy this game.
The only thing worth investing in the shop was the extra cars and missiles, because then my cannon became obsolete and all I had to do is stay just far enough away from the enemies so they can't shoot me, but my missiles can get them.