Pro:
Very nice beat, I really thought it flowed with the "dark/evil" theme you are looking for
Nice choice of synth, reminds me almost of Super Mario 64 - Bowser's theme track which gives the same theme.
I really like it!
Con:
There's basically 2 things that I might have done to give the song more power:
I felt like the reverb on the drums were a little heavy for me (too over powering) and it took away from the sound
and EQ on the main synth I felt needed to be worked on, kind of like making it more sharp specially with the distortion already in play. With making the synth more on the sharp/higher end if you wanted to then balance that with a low end bass (3xosc should do the trick)!

Other than that I felt you nailed the dark/evil theme with the instrument choice and structure!

Oh man, that's killer. That's some sinister stuff right there. Reminds of stuff me and cousin used to make on Noteworthy Composer back in the day, The sound quality of your instruments is much better than what we had, that's for sure. I'm really into this. That's some straight up Mario 64 Bower music if I ever heard any. I am a fan. I saw this on the Review for Review thread and thought I'd check it out. I won't post anything there though, that way you get another review as well. Have a good one ;-)