A little project I have been working on, over 1500 lines of lua. Still kinda buggy, but working on fixes. Hope to get it on the AppStore soon. Let me know on GitHub if you find any bugs.
Update - Apple rejected the app based on the fact there were other similar games on the store.
Looks like a neat galaga clone. Will you be posting the project code? I for one would like to see it and gain some insight into how you decided to code it.