Its a very easy engine to use, and many, many users use it, its free engine, but you can also buy extra functions to it. So you can delete thier splash screen and add you own.
Great engine, now with version 3.1, integrating the haxe language, we develop our games natively on the platform, either windows, linux, android or iphone; getting a great improvement in performance when running applications.
To create a game on this engine is so easy like pushing "Space Bar" on keyboard. There is no programing needed (Well ypu can do it if you want) you just download it in the local program. Evrything is just so simple there that even a 5 year old can create a basic game.
I'm useing this engine to create a game. Whitch soon I'm going to publish here at moddb.com
And the best part of this is that this engine is FREE !!!
But also you can buy it for some special thing like creating own loading screen and adding companys logo anim.
This is one of the best programs for creating flash games, I recommend it!