I'd like to recommend creating a account so me or other members can assist you, as guest have limitations in replying here and if we need further Information to communicate with you.
If you're seeing it in the play store when you're on the Prime, you're only seeing apps that are compatible with it.
Register so you can respond here, then let us know what kind of installation problem you're having. "Won't install" doesn't tell us much. The installation fails? You get an error message? It won't run? What?