The art, music, and sound effects are really great! And it's a good unique use of the theme! But I think the spikes blend into the background a little too much - a few times I just ran into them because I didn't notice them. Also, it didn't feel like that much of a challenge, but that most of the times I was dying was because I forgot I couldn't jump, or didn't see a spike, or incorrectly judged the throw trajectory. Great work though!