Really love the visual style! The large variety in the hexagons also makes the game more pleasant to play than before. Glad you ended up making the music yourself! It fits the visual mood. It doesn't always loop, though. Not sure why. I broke it once by going to another window and clicking back again.

The sound effects are a bit of a hit and miss. The sound of picking a hex hurts my ears. I like the sound of clicking an empty hex though. Successful pairing sound is somewhere in between.

The orange text with grayish light blue background was hard for me to see and read.

I got a slight nostalgic feeling from the game. Probably because the hex-graphics resemble some of my childhood games.