Before I say anything else, let me just say that I love Secrets of the Shadows. It's easily taken its place as my #1 Terraria mod; the void mechanic is interesting, the sprite work is amazing, and the bosses are incredibly unique. I've never seen anything like the Pharaoh's Curse boss fight, for example.
That said, I have somewhat of a tall request to make: would you please consider making the source code public? I'd love to study it so I can learn more about modding Terraria, as there are a lot of things here that I don't see in many other mods (like the Pharaoh's Cane, which increases the gold dropped by enemies). It'd mean the world to me, and I'm sure there are plenty of other people who would also appreciate it.