Coding Club with Scratch

We have a once a week after school coding club for 4th and 5th graders.  Does anyone have any suggestions for best practices that keep these bright students engaged in both coding and collaborating with Scratch?  I have found that some of the students are finding others games that have been shared and now want to just play them rather than code their own.  The games they like usually have code that is more complicated than they are able to follow so asking them to look at the code then make their owh is too hard for them.  How do I keep their interest in coding so they can improve their skills with Scratch?  I think this stems from the "want it now mentality"  The kids loved initially seeing what they could do in the program, but then they also loved playing the games that more experienced coders already created.  I want creators, not consumers.  Any suggestions would be appreciated.