It is very unusual to have your daughter make the art for your game so I'm taking this in consideration! ^^
Even though we could judge the art for its quality I personally find it heartfelt by your kid and there was honestly something special I felt through the graphics and the sound, that was super cute! :)
The controls were very easy to pick up, when colliding with the sea urchins the fact it was resetting in front of it made it fair since starting all over again would've been a reason to quit the game by lack of motivation/boredom.
The choices are also easy enough to be understood by children so that's a good point in game design.
I didn't encouter any bug so far and the length of the playing session is convenient for kids to be concentrated until the end in my opinion.
It's also nice for the git repository but it throws a not found error, but anyways, I found it very nice from you to do something with your daugther so that she can express herself in an interactive way through a meaningful cause! :)