Hmm, well I was able to use a seed, but it only appeared onscreen for a second or two. I couldn't really use it. Whatever, this was an enjoyable game even if I couldn't advance that far. The music was nice and soothing. The best part was probably how I had good mobility. It was a unique way of attacking.
You omitted any black lines. I should take note of that in more games. Was I supposed to jump on top of the plant immediately as it grew? I put in below me, but it couldn't propel me anywhere. At least I knew how to aim it.