I've had the opportunity to test this game on stream alongside its creator. It has been a perfect experience.
I will always positively value any original idea that is executed, and this game has managed to apply a new idea ingeniously and swiftly. I also value the use of a restrictive color palette, only 4, and minimalism taken to its highest expression.
However, I do miss a bit of UI indicating the score or turns, just to nitpick a bit. The particle effects add a professional touch to the overall finish of the game, and it has been fun to try out the different patterns of the runes.
I wish I had been more skillful to achieve a better score, but as we all know, roguelikes are complex games where we die a lot and often, haha. Technically, I find no shortcomings, and I like the minimalist design! If you decide to finish the project, it would be nice to add a hardcoded mini tutorial showing the runes or a help window showing the in-game controls.
In conclusion; I really liked the game, and the idea is truly original. I have to congratulate you on your work, it's amazing.