Great!
This is your first flash? You are brilliant at what you do, let me tell you. Of course, you do need more practice with more character movement, but like you already said, you're a beginner and this is your first.
Also, I think that no-noses thing is cool. It's a different art style from many other things, and when I saw that arm, it did remind me of Devil May Cry, but I didn't think you stole the idea. You're right with the fact that it's no longer new. Chad uses it in Bleach, and nobody's crying to that show calling it a rip-off.
10/10 for the amount of artwork and colours used.
10/10 for the amount of work it seems you put into this.
10/10 for this really cool idea, and it looks like it will have an awesome story. I want to find out how he got that arm.
?/10: I didn't really like the song that much, but in my opinion it's perfect for an anime intro.
If this becomes a series eventually, I will be watching it.
Awesome work! I hope to see more from you!