Both .apk most sign that i get from intel xdk
i am going sign manually
why not build with visual studio - you get a apk that is signed and not signed (release / debug ) - check it on google.
it's free (community edition)
WHERE IS THE TUTORIAL FOR C2 AND VS 2015
Develop games in your browser. Powerful, performant & highly capable.
i don't know. it shouldn't be too hard to create a game through it though.