This was really well done, and the levels felt pretty fun to puzzle through! The gimmick of using cassettes was well executed and I liked the work that went into the audio cues like the warble on the music when running it back.
As a bit of polish I'd personally like to see, I think it would be nice if it was noticeable at a glance when cassettes are wound forward or back, though there's never enough cassettes at a time where it feels overwhelming to just keep track of them mentally.