At first, I’m a little confused. I wasn’t sure about the order of the flags. Maybe you can add a number to the flagpole to indicate the order of the flags. Also, after passing all the flagpoles, I couldn’t get to the next level.
And I think there is a design that can improve the game experience. There seems like wall at the platform edge, but characters could pass through it. Or some platforms can be modified as jump-through platforms.
Anyway, it's a great game, with geat graphics and music, I like it