This is an interesting mechanic for a game! and the little guy is so cute :D I like the sounds as well, so good job there.
It wasn't immediately clear that I needed to press Space to advance the dialogue.
For the combat, I actually was enjoying extinguishing the shadows. But the enemies piled up SO fast. I don't know if I was missing a mechanic to finish the ritual, but I was protecting the lamp after lighting it and the enemies never slowed down. Reading the comments now I see others have progressed, so I am going to give it another go.
UPDATE:
There are multiple lamps to light! After getting triple shot I see the progression, nice work! I'd say the second level is a bit dark, but still very cool