It would really add a lot to have a leaderboard. I also missed that some enemies didn’t die in just 1 hit, maybe that the 'game over' should happen when 1 plant dies, not all of them, and that the hammer’s point should match the actual hitbox square. Still, it fits the theme, and the gameplay/art/fun/sfx are ok ,3 stars in each one.
Very good job in just a few hours!