Hi,
-- You can use ArrayMaker combined with EasySave ( it can load/save online)
-- you can use Parse, but it comes at a coast if your game gets succesfull with many hits ( you have room tho...)
-- you can use a game distribution engine framework, typically, this is only if you want to distribute your game insie such system like Steam or else.
-- you can use the GameCenter if you are on IOS
-- you'll find many solutions on the asset stores, double check if they support PlayMaker, simply ask the author before purchasing if in doubt
Bye,
Jean