This is such an amazing tower defense game! I am a sucker for tower defense games. I played Pokémon Tower Defense for like ages when I was a child. It was my gem. And the art is amazing. I can see you're a great artist, and the concept is great, and the gameplay too, it's hard to do a good tower defense game in such a short time and so well, so congrats.
But I do have a little feedback.
First, I would like some stackable options. And in my opinion, anti-wilt is a bit OP and shouldn't be in every day because I could buy it very easily after some rounds and just put it on all the plants and do it every round because I could get it very easily. I just use it all the time to no end. The first levels were actually harder than the last levels because I had less money. I would prefer flower to bug color coordination, but I see the vision of power dynamics like in Pokémon types, so I totally understand and you don't need to change that. Visual feedback for when fertilizer is applied on the flowers would really help. One of the beetles in day 16 went off the road, it just went up out of the screen after the second flower bed. And overall, I see you are going to expand and adding more flower beds that we can buy, so that would be great.
I really like the concept. I can see how it can really easily be expandable and I think it's a really great start. So please, expand on it. Please make it the best tower defense game ever. I am a big fan. Thank you.
Sorry for the long read!