Great work on coding a character who can jump! It looks like you've worked really hard on this. I love your art and character design. The code that's spawning the spikes works great!
Functionality wise, it doesn't seem like the score or lives are working correctly.
That said, I feel like it's a great game, and I'm really happy that you submitted it to the competition. I know that it can be nerve-wracking to do things like this, and you should be proud of yourself for putting your game out there. Well done!