Incredible art direction and presentation in this one! I am amazed such a game can be made in 4 days!
The gameplay is very simple but it goes well with the aesthetics of the game. I understand that you wished to keep the spacing between "rounds" long to keep in line with the zen theme, but I wished it was faster to be more game-like. Also it seems to suggest it gets deeper into one's mind and be more zen and destroying distractions, yet the music continually crescendos more and more after each round, making it more intense and kinda contrary to what you wanted to portray.
It is a great project though. Would like to see it become even better.