Nice
The game itself is good. I like the nostalgic sprite graphics, and the music fits a newgrounds submission well. There are lots of weapons and enemies which is nice, and even bosses too! :D
The difficulty is challenging which is nice. Over all I enjoyed this until I died and accidentally clicked the screen which takes you to the main page... That is really annoying. Why would you do that?! T_T I really didn't feel like playing it over from the start again... There should be a separate button for that... It's a really unnecessary reason for people to lose interest in an otherwise good game.
Also, at one point I went back through a door i had came from (in the mansion I think), and when I went through the door a third time (to advance again) I ended up at the woods before the mansion. So a little bug there, but overall that didn't bother me too much. At least it didn't make me start over. :P
Nice game, keep it up!