It could do with some comments and doc-strings certainly, but I'd give it a pass for now as it's a new project. As for the code, I imagine that in any language, highly optimised programs can start looking pretty odd after a while. Try understanding "grep" for example:

http://git.savannah.gnu.org/cgit/grep.git/tree/src/grep.c

As a guy not particularly proficient in C, that looks crazy to me. Although it does at least have decent comments, which I'd expect for such a mature project!