Pretty nice game overall, here's a quick detail:
Gameplay
Nice unconventional idea, it's very playable with a mouse in browser (besides minor lag sometimes), however it gets repetitive fairly quickly
Graphics
The art is quite nice, everything is in different styles which is a bit odd but it looks good
Audio
I love the music, sound effects would be great for rune feedback
Innovation
5/5, different from all the games I've rated this jam
Theme interpretation
Not so sure about that one, pen bounds maybe?