You're off to a decent start, the cliff itself needs some work though. I prefer turning it at a slant, to do that you line up the top and push every "layer" down one. The top of the -> facing cliff is too high. It needs to be brought down a little. I'll try to draw all of this out in paint. In red is the cliff-too-high issue, and in purple is how you get the slant style.
With the purple, you just keep doing that until it aligns itself with the bottom. Try it out and play with it a bit, you'll get it in no time. In the end it should look something like this...
