I'm joining the players who couldn't jump over the fireball :DD It seems a bit tricky. It always catches me on the first step, right when I reach the dog. Maybe adding an ability to speed up could help here?
It's a really nice game though, and I love the idea! The game looks really pretty, too. One advice I have for the future is playtesting the game with your friends/family. It will help you figure out moments where players might get stuck in the game or things that need more explanation c: