First off, congrats on your first published game, it's absolutely phenomenal as an opening project!
Now, as pretty much everyone has stated, your strongest skill is definitely art, this game is just lovely to look at. It all feels so bouncy and lively, it's got a particular joyous vibe to it that's hard to put into words but is incredibly wonderful to experience. Your cover image is also such a great display of the effort you've put into this.
The game design is something I feel also deserves great praise, the slow incorporation of the different obstacles and the super intuitive UI that is both easy to understand and sets the tone for the game world is absolutely amazing for a first public project, and is one of the best cases of readable and clean game design I've seen this entire jam!
Genuinely outstanding work, I'm excited to see what you create in the future.