Very nice to see my game on a real GBC screen in my turn, especially since I had only tested it on Game Boy DMG and GBA on my side :D .
Thanks for your feedback on the game, and I'm glad you liked it, even on its "blind" part, the reference to electronic games like "Simon" is totally assumed :D . I am currently developing an update of the game which will propose 2 new modes. A mode with clues, and a mode with melodies to find the keys, I hope that it will satisfy those who did not understand the interest of "guessing" the keys and having a good memory!
If not, you have finished the game, so we are safe from the asteroid, since the Space Game Boy destroyed it :D
For the musics I am happy that you like them, they were my first realizations on Game Boy, indeed (slightly), inspired ;) . Good luck for the results of the Jam :) .