I've been enjoying your port of Doom elhobbs. I'm playing the latest GitHub build that you have posted (as of 10/1/2015) on an N3DS with emunand 9.5 (OFW 9.0). The performance is great and the sound + music is typically good. After playing through Episode 4, I found a few bugs:
-After about 10 minutes of play, the sound begins to crackle and echo. If I quit Doom and reload the app, the issue is gone... for about 10 minutes.
If I continue playing while it crackles/echos, it continues to get worse and eventually locks up.
-The Spider Mastermind on E4M8 hard locks the game/N3DS every time I approach in the final room.