If you are looking for an application that will help you to build games that have multiple levels, use graphics and sound, and help you to build your applications in a variety of different ways, you need to check out the Unreal Development Kit. This is an application that will help you build your applications in a way that will help to make sure that you are not going to end up wasting a lot of time and energy trying to create different levels. The reason that this is so important is because it means that you can spend more time creating and making a new level and you can spend the rest of your time creating and adding content to your application.
The good news is that the Unreal Development Kit is free software and you can download it and use it for as long as you want to. You will find that this application is going to be easy to use and that it will help you create a number of different applications. Once you have the Unreal Development Kit, you will find that you can download applications that include the tools that you need to create your application and that you can create an application for both the Windows and Mac operating systems.