Riddle Runes

Mysterious runes appear on your screen. You tap one and it lights up... and so does that other line over there. You tap another, and it turns red. There's a logical system underlying it all, but it might take you a long time to work out! To activate everything you'll really need to understand what you're doing...

Working out things by yourself is part of the fun. However, it's pretty tough to solve without hints! So if you get stuck, check out the hints here:
http://www.zithral.com/games/sigils/hints/

This game was made during Global Game Jam 2016 by a single developer. The entire game was made in only 48 hours, with only minor changes since then.