This is very beautiful! The plant looks amazing, the bugs look cute, the gameplay reminds me of the golden age of mobile games too, which is a big plus for me. Seems to me you've spent quite some time making this game a reality, good job!
For some criticism I think the lack of sound really pulls down the game quite a lot. I see the sound slider there so I guess it's just a matter of lack of dev time. Also, the drawing mechanic somethings doesn't start for some reason. If it's some hidden mechanic I think it should be better conveyed to the player in-game.
Anyway, I think you did a very nice job! Well done!