Alright, I´m experiencing also a couple of problems while playing the nice path (rough path worked actually fine on my end). After the switch from the Bench to Joey´s room the inventory bar vanishes and when I continue to the scene get the message "give her the flowers (Be NICE)" which then vanishes, the mouse cursor vanishes and I can´t enter the menu and have to alt+F4 my way out of the game.
Hope this helps, also played this on my own savefile which has been updated with each release of the game.