either use a teleporter for a later looking secret, or just use different rooms for more old styled secrets. for the music use the background and music trigger for both leaving and entering.
you couldnt add tails and other things because of some limits that the system has. but there *is* a way that you can bypass the limit. if you open up the p8 file using an code editor you can write any code without thinking of the limts pico 8 has.
