Hey! Awesome job with the game, especially getting it done well before the deadline! You make effective use of the theme with having to figure out how all of the elements affect you since the instructor is unreliable. It might be interesting to have those effects change on each run so every time you play is a different ruleset you have to figure out.
I do think the hits to health can be a bit unforgiving, especially with how large the player is, how close together flowers can spawn, and how close to the ground the flowers are. I found myself dying right away for the first few runs, and didn't get a decent cadence going until maybe 3-4 attempts in. I think a smaller character/hitbox and making the flowers just a little higher up + further apart would likely solve this, but overall more margin for error would be great!
Some little nitpicky things: the game elements continue to spawn after the player dies, not a problem but should probably stop. The "Play" button in the beginning could use a bit more feedback for hover/click. I find that UI elements should be pretty high contrast and obvious. The pollen/health bar doesn't start all the way up, which I found a bit odd.
Overall, it's a really cute game and pretty fun to play once you get the hang of it! These are just some thoughts, so do with them what you will. Hope you enjoyed working on it!