God is Dead! I've enjoyed this one a lot. The patterns for the first and last boss are great, and the choice of songs was on point (I particularly love the 2nd boss track). To me, the 2nd boss was the hardest of all, because of all the teleporting shenanigans. Reflecting the bullets back is a nice mechanic and it was done very well in this entry, especially because you can't (usually) just mash and win (well maybe if you time it right, but I took a few hits trying to cheese the bosses).
Come to think of it, this game would be pretty fun to speedrun. Good job!