Intro was the best
I think the intro was the best, it had such a good hook to it and make me listen to this whole song, but the bass didnt sound good after awhile. It was too..gritty? lol i dont know how to say but maybe layer it to still make it powerful but yeah, the bass was just weird in my opinion. The effects you used throughout the song and all the changes you made was interesting. Seems like a lot of stuff put into this. My only problem is the bass right now tho. Everything else seems nice, good luck makin it to a full song. 9/10. 5/5.
One other suggestion - maybe get a full sample of the siren and let it run instead of having it cut off.