Kindle Fire 10' crashes frequently while running fantasy player

I think I said what needs to be known in the title. I have reinstalled the app several times, limiting how many soundsets I install each time to the mimimum, but it randomly crashes anywhere from 5 to 45 minutes of playing. I tried running it off of my Iphone, but the screen is just too small to be practical. Ideally, the ability to run the player minimized on my Chromebook would be best. Any suggestions for the tablet issue.