Infiltration at Dusk is available to play right now. It was originally released in 2010 as part of the Boing Boing Games Inspired by Music contest where it finished 2nd overall in the competition. You can read more about the game and contest if you'd like.
You should also be sure to play the follow-up release Re-Infiltration at Dusk featuring several new enemies!
Looks good! I like the interplay between light and darkness.