Free 2d game engines?

Free 2d game engines?

Not sure where to post this, but here goes. Are there any free 2d game engines I can use to make a game without knowing how to code? In particular I was looking for something lightweight that the original iphone could easily run, that lets me make a 2d game with snes-ps1 quality graphics. I get that the iphone uses a risc processor, and the pc uses cisc, would one engine be able to make a game that can run on both?

I'm just getting started with the idea of making a game, and have no idea where to begin. I'm an ok 2d artist, my wife is excellent at it, and between the two of us we have quite a few idea's for a turn based rpg, but almost as many questions about where to start.