I absolutely love the artstyle of your game! The enemy design, the UI, the blood effects... everything looks so nice and clean. Also big props for the sound design as well. The eerie, yet beautiful humming that plays while selecting sigils adds such haunting vibe to it. Same with the ambient sounds that play while fighting enemies. It's by far the best looking and sounding game I've played in this jam so far. It's a piece of art.
As for the gameplay.. it's simple but fun. After a while it gets a bit broken if you manage to stack a lot of sigils at which point you can basically one hit everything. It also gets a bit laggy at the later stages where a lot of enemies are spawning in. Maybe the amount of enemies could be limited, to prevent this.
All in all I love what you made here. Be very proud of yourself!