What’s the point? – Merge Plane Review

What is the point of this game? I maxed out all the planes to 12. There doesn’t seem to be any thing beyond that as you can’t merger the level 12 planes. Also if you leave the app for too long your earnings go into the negative. So really. What is the point of this game??? Watch adds and merge planes until you can no longer upgrade? Stupid!
Review by el_kibbino on Merge Plane.