I wasn't understanding something, as never could get the 2nd cassette, but the music is great and i do like the puzzle aspect!
Thank you so much. I'm gonna make a video on how to solve each level and post it in the game page.
Tried some more and it finally mostly clicked, played through all but the last two levels, very good!!
Thanks. I'm glad to know. I posted a video in game page.
Link is here if you're interested.