Android game in amazon app market

Hi, I've few questions about the amazon App market(Android). Recently I publish my first free game in Google play and I was wondering if can publish the game in the amazon market.

1. Can I have my App upload in both markets without eny problems with the licence of google or amazon ?

2. If is posible to have it in both markets I must change package name or I can use the same APK file for both markets?

3. In my App I use google play services, admob, google analytics and some more native plugins, I need to remove this plugins(Google) or I can leave it?

4. I must change anything else of my App to be compatible with amazon market?

5. It's good idea to publish/index my App in alternative makets or with google play is enough?

Here is my game if you want test/play: https://play.google.com/store/apps/details?id=com.IndieRider.SSSnake