I really like this and keep coming back for more punishment! It can feel a little unfair sometimes but it's nice to play.
Not much instruction so I was avoiding the things which give you life for the first couple of goes because I thought they were fire.
Shame you didn't have time to create some artwork for the black boxes because, like others have said, it otherwise looks and sounds really polished.
I like the zoom out effect when you grow several plants underfoot - it would be good if the player could also control this so you can see what's above you and decide whether it's worth growing a tower of plants or not.