Congrats on your firt game, I also realease dmy first game ever for this game jam so I know what it takes ;)
It's a really lovely game, I don't know if you did the different backgrounds yourself but they are beautiful each in their own style. The character art is really good too. The music is beautiful too, goes well with the story of your game.
Those frogs drove me crazy I have to admit haha, that part of the game was pretty hard.
The coin mechanic is not new but still works, although I wish there had been different items to collect.
Overall a nice entry, you should keep developing games!