First of all, Did you even have Sanxion7's explicit permission to make a remix of his "Red Gaia"?
If you didn't, then you'd be considered a thief because you infringed rights to his song.
Second, why did you make this song twice as fast as the original tempo?
It sounds, (in my opinion) bad. Really really bad. Do not take this as a flamer's comment. This is constructive criticism.
This shouldn't even be considered a remix. It is only the song sped up as I see no difference in beat changes, melody, or anything that is remixed to create a different song but shares the same theme.
In the future, please do make legit remixes, rather than editing songs and speeding them up. You have a lot of potential and I like to see some of your future works.