Beautiful visuals and choice of colors, and the idea for the story resonates with me. I always appreciate a good gradient and glow :D
There's not much in terms of mechanics and level design though, I'd honestly just leave out most of the platforming and focus on telling the story through other kinds of puzzles or progress mechanics. The art and story can stand on their own and doesn't need an excuse to "exist". I want to see the weird and interesting plants this scientist has bred and discovered without them having to serve a pure gameplay-need. Heck, even treating the player to visual spectacle as a response to their actions can be gameplay enough.
By the way, the wall climbing is somewhat broken. You don't need to use a single seed or anything, you can just stick to any wall and "fly" up by repeatedly pressing jump. I think I managed to reach the top in less than 10 seconds.