Apple Prophet writes
"Just a few short weeks after BitBlot released the source to Aquaria as part of the Humble Indie Bundle, Andrew Church hacked up an ambitious homebrew port of the game to the PSP. He wrote a detailed synopsis of the technical challenges in an article on the Wolfire Blog, and of course, contributed all of the patches back to the project so anyone with a homebrew-equipped PSP can try it out. Check out the mercurial repository for the source."