This is a great game. Here's a few things to improve it:
1) have some feedback when removing the weeds, like some sound and animation
2) some juice, like screen-shake + sound when a weed over-grows
Otherwise it's a really good game, great team work!
P.S. I hope you continue to make it, and add another boy character, so I can play as the soy-boy (I'm joking about the soy-boy, don't take it seriously ;) )