Powerful enough for professionals yet easy enough for beginners. The creators of Clickteam Fusion 2.5 have a long and proud history in developing software such as this.
CF 2.5 is in fact so versatile and powerful yet easy to use that the roughly 1 hour long step by step & easy to follow tutorial will guide the user in the development of a simple game with ready made assets. The tutorial also serves as an introduction to key topics of game development, these key topics are covered in a way as to make the requirement of a University degree unnecessary (such topics include 'the player object', collision detection & event triggers). CF 2.5 is simply an AAA+ software suite that is easy to get started with and in a league of it's own when it comes to video game and general purpose software development.
To state an overused phrase 'in this day and age' where the percentage of games developed from scratch is next to nil, it is no longer taboo utilizing such software for video game and general purpose software development (in fact in the developer edition you don't even have to give credit to Click Team for the development of your games & apps). While many alternatives in the form of game engines and engine+SDK hybrids do exist, CF 2.5 is not only the most versatile given it's video game and general purpose software focus it is also the most readily accessible to beginners.
To conclude CF 2.5 will be a heavily relied upon and favourite for many first time and estaiblished indie developers. Having CF 2.5 ready with out of the box support for community created extensions is simply an added bonus while official extensions will add the potential of video game and software development for platforms other then Microsoft Windows powered desktop/laptop computers.