The only two endings I typically consider 'standard' are fade-outs or satisfying endings (don't know how to describe them: the way pop songs or classical musics end). Your ending did not feel like a standard ending; it felt like the song could very well continue after the final 'bleeps'. But that is not necessarily a bad thing! I think I mainly got surprised because, after those bleeps, the song cut off quite quickly (instead of your usual '2 seconds of silence') and another song started playing, which caught me off-guard. And the reason it cut off quite quickly is because I used a poor site to change your WAV to MP3, so that is not your fault ;)
I intend to rate everyone's track, and since I listen to every track about 2-3 times before I give a detailed rating and comment, I can only give about 7 songs a rating per hour xD. Thursday or Friday, when I have finally finished all the songs, I intend to come back and listen to your other enemy songs, and to give commentary on them :D (if only I won't forget...)