I'm sorry. The puzzle is bugged and will need to be fixed. Try flipping the purple piece around if it doesn't work on row 3. I promise the songs only get better after.
thank you for the response, and no need to apologise haha. its a game jam, all our games have bugs :). yeah i ended up figuring out what was wrong, but the puzzle after also seemed to have a similar issue, the wrong bar was being shown to me. might be a bug that only affects some users though. id love to finish the game after the jam if you could push out a patch :)
oh huh, i just looked closer at your screenshot, you arent even talking about the same bug i had :P. on my computer, while the game said it was playing me bar 3 in the preview, the bar 4 audio was actually being played. this is the bug that is also in future levels for me, the early bars of the level after are also affected im pretty sure, im not sure what else. I assume this is a niche bug that only affects certain users