Hi, I am happy that you enjoyed the game.
I was planning to add a tutorial but couldn't due to lack of time. And I agree with you on the plain grey background, I am not a great artist, if you observe all the objects are just Polygon2Ds. Haha. I try to compensate it with gameplay. I am glad you liked the gameplay.
And the top bar is a progress bar, indicating number of flowers you have collected out of how many you need to collect to win the game. I was not able communicate it well.
Thankyou so much for your appreciation.