These two enemies have full rotation and can turn away from obstacles. There's little more to it than that... going forward we would want to introduce some rudimentary path finding skills - either that or a short term memory of some sort to keep them from trying the same movement over and over when it fails each time. Have some fun - change the level costume - see how the enemy cope :) - Try adding more enemy? Make it scrolling? Can you make them more intelligent? What can you do!!! Let me know.