Playing this game was an amazing experience. I can't stress just how much I appreciate the storyline, it clearly shows the enormous effort you've put into the characterisation of each character as well as the plot itself. I would rate this story on par with Xenogears', it has the right balance of adventure, mystery and humour that keeps the player entertained and dying to find out more. Further more, it has a very satisfying conclusion which also carries a very meaningful message. To me, this game is complete and there is no need for a sequel. I do encourage the creator to continue writing stories for new games, you clearly have the talent to wow us all.
Game play wise, it is pretty simple. I like the variety of weapons you can choose. An improvement would be to introduce more enemy types and bosses. Can't complain too much though as I played this game mostly for the story, it alone is enough to persuade me to give this a 5 star.