The pixel art is really nice, and the lighting/shadows are standout, even your lantern attack looks awesome. The lantern attack is such a cool idea too, I haven't really played something where opening up the light is the weapon, at least not like this. Auto-aim works great for keeping it flowing.
Also appreciated all the little details added: the voice work adds a lot, and having proper volume control (with the mixer routing). The menu being fully keyboard-friendly was a big plus for me too.
Level/puzzle design is really strong. Switching lantern colors adds those nice "stop and think" moments without ever feeling frustrating, and the health pickups were a smart addition. Really super polished, amazing jam entry.