GameMaker is usually the go to recommendation for rapid prototyping, and game development at a higher level of abstraction than Unity. I've lately been hearing

GameMaker is usually the go to recommendation for rapid prototyping, and game development at a higher level of abstraction than Unity. I've lately been hearing some positive buzz around Godot, particularly for 2D games. But I also get the impression that there is a learning curve. https://godotengine.org/ https://godotengine.org/ If you want to bring your flash skills into the modern world, Haxe might be worth looking at: http://haxe.org/ http://haxe.org/ particularly with a framework like OpenFL. http://www.openfl.org/ http://www.openfl.org/ Here is a good article on the post flash gamedev world: http://www.gamasutra.com/blogs/LarsDoucet/20150915/252693/Where_have_all_the_Flash_developers_gone.php http://www.gamasutra.com/blogs/LarsDoucet/20150915/252693/Wh... I haven't tried any of the above. But I've heard good things about all of them.