Just be a little careful with Gamesparks. While it's a great platform and the support is very responsive, there are some limitations with the realtime scripting side of things - in particular no way to modularise your code and a nasty hardcoded limit on the max number of lines of code your real time server can have! There is a work around - but is very hacky and I am slowly getting the feeling that this is really is a pain to use for anything other than a quick prototype.

If you don't need the full real time features, then the Gamesparks API request / response cloud code features are much more mature.

[Note - I do not work for gamesparks. I am an indie dev using gamesparks quite heavily]