Yes… as long as you have the rights or permission to do so!
You are more than welcome to sample and remix your own content. However, if you want to distribute a remix of a song that doesn’t belong to you, you’ll need to get hold of the necessary rights and permission.
Our partner stores rely on us to make sure everything we send to them is legitimate, and to distribute a remix of someone else’s song without their permission would be a breach of copyright.