In this video we learn about the core functionality of FlashPunk based on worlds and entities. We also get to some pixel art. In the video, Paint.NET was used - you can use anything you like but you if you’re struggling to find something, try out Paint.NET. Mac users can try Seashore and a completely cross platform solution is GIMP. Of course, Adobe has several expensive solutions as well that you can use if you have access to them.