I did like your interpretation on the Afterlife (in this case Christian) and the angels and demon mythos. The problem you encounter in religious themed books is that it becomes preachy and over-bearing, luckly here you didn't do anything like that :)

The voyage of Spoony's descent into Earth, him bounding with Linkara and having character development was a joy to read. I also enjoyed the battle scenes between Insano and Spoony.

Suprised by the happy ending (meaning that you are not fully corrupted by the evil robot known as lady_sci_fi ;) ).