First, you wrote a dubstep at 145 BPM. I am somewhat impressed because a qualification for dubstep is a BPM between 120 and 130. However, this still sounded fine.
Second, you said:
"While I was making this song I still had no name for it, until at the end it occurred to me out of nowhere Collision, the same situation that happened to me while producing Cosmic Journey"
This is pretty much how I come up with all of my song names. If you are ever stuck, though, I suggest posting it and asking people what it should be named. Alternitavly you could brainstorm an album theme (creomusic tends to use names that have something to do with a circle) and then go from there.
Third, here is a second-by-second review of the song:
Intro [0:00 to 0:44]: I liked it. Rythym is very good, I like the cymbal especially. I also enjoyed the melody
[0:44 to 0:54]: good transition. Maybe needs a little more / stronger bass, but still good
[0:54 to 1:48]: really long, also growler sounds a little weird. Maybe change up some of this by adding more instruments or a slightly different melody here, or just cutting it down by half.
[1:48 to 2:02] good transition for what came next. Cooled off the growler really well.
[2:02 to 2:54] cut this in half or use this to somewhat build up to the next section.
[2:54 to 3:46] same as 0:44 to 1:48.
[3:46 to 4:15] still strange growler, but this is a much better length.
[4:15 to 4:53] ok ending.
This is really good for two days and not knowing how to make Dubstep super well. I really like the lead-up, but the growler you used could use some work. It is a tad fast, so if you want to add length to your song without repeating anything, maybe lower the BPM down to at least 130 (but I suggest 120).
EDIT: You were right, dubstep is from 132–142 BPM. Just goes to show how much I know about dubstep XD