A game engine or framework that has not yet been released? Similar to Startling and Filxel, it is now based on rendering on OpenFL. Its advantage is that it defaults to using a multi texture rendering engine.
You can notice the number of drawcalls in the image above. Even if there are objects such as text blocks, rabbits, etc., only 1 drawcall is needed. It can render up to 16 textures simultaneously (the number supported varies depending on the device).