Just played. I have not been able to create anything beyond one egg and one moth larva. Is that what's currently available or is there a moth bug?
I like what you have so far. The art is really cute. One suggestion on the text for your itch page (not the in game text). It looks nice, but is faint and its small size makes it hard to read. If it can be increased a size or two, that would probably help potential downloaders read it better.
The egg and caterpillar not having hover effects does not stand out too bad to me, but it you add them, just making the egg or caterpillar a bit brighter would work for an effect.