Hey Luuk, nice work. I think the cover art should reflect the style of music. I'm just not getting rap from this art. (I assume it's rap with the advisory)
I think the overall color is subdued and there's no contrast. When I think of rap I think of red or other bright and aggressive colors.
The text combined with the clipping mask effect is not a good combination. Images clipped in text is a dated effect and is just not seen much anymore. The text is a bit ambiguous, the G looks like a 6.
Personally i do not see what money has to do with the cover, the cover shows explicit content, and appears to be advertising yourself, my be i'm getting this the wrong way, but don't understand what the CD cover is for or what the money in the text is meant to represent.