Hi! Thank you so much trying the game out!
That is all supposed to happen.
After interacting with the pianist you are forced to wake up, and if you try to enter flow again, it should tell you that you need to execute a mindscan before entering flow again, which is important because it gives you the code to insert in the Hell door and reach the ending.
I will write a walkthrough and post it on the game's page as soon as the jam is over (or am I allowed to add it even before?) Edit: I added it just now, I hope it's ok ^^
Let me know if this helps or if it is a bug I need to look further into!