Hello Marcel
I am sorry for my late reply, but thank you for your post!
Unfortunately, I honestly don't know of any other hummingbird game that matches your description. My game was created as a student project and was made with a lot of passion, so it's fascinating to hear that there may have been a similar game years ago.
I hope that one day I'll be able to develop this idea into a full game with beautiful visuals, where players can both learn about nature and enjoy a relaxing gameplay experience.
I have actually just released the second version of the game, which focuses on different power-ups and gameplay progression in my same home page here, link: Kolibri 2 by Rasekh .
I hope you enjoy trying it out!
Sincerely,
Rasekh