I will not critique this is as a song, but as a preview.
Build is exciting, and reminds me much of teh Popular game DooM. At 42 seconds in I hear this slight drumbeat, and its nice, just doesn't seem to fit the rest of the song. Add a little deeper bassline, maybe even some kind of epic electric beat, it just is missing the fundamental bass, which make this song hollow. I see you tried at 25seconds, but make it a bit Harder.
Very good intro section, but right at :32 I would suggest started up a louder bass in the background. Personally, deeper/louder bass is better for me, but thats just my personal opinion.
:52 also needs something new to be added in.
It would fit the pattern in my head :3
Good Start and Buildup
If and only if the ending is as good as this buildup i will give it a 10.
Sounds fair to me :)
Please contact me if you would like to use this in a project. We can discuss the details.