I am level 27 (leveled up during the event) and just finished last night! I don't have any alicorns or source of extra energy. I have a greenhouse but not enough resources to use it. Anyway, it can be done! Just keep on clicking... the hardest thing for me wasn't the petals, it was the antennae. I'm really happy that there were enough crowns from this and the sea foam serenade to get the guardsman! Now I have guard dogs to hopefully drop meals and armor, yea! I enjoyed this one!