It is highly recommended that if you want to follow the Genesis story line in a traditional fashion (ie., linear narrtive) that you start with the Episode Listing. When you jump to a story section read that particular segement until you come to the episode break bar which looks like this:
Then hit the NETSCAPE back kick to go back to the episode listing. Go down each entry in the episode listing until you've finished that episode. If you just want to meander about Genesis Space Station and check out the place then by all means use the controls. Most importantly... Have fun!