Thank you so much for playing! I’m really glad you found the parts you reached interesting, and I’m sorry the unclear progression prevented you from getting further.
The current build does not distinguish clearly enough between puzzle items, narrative clues, and longer-term story items. For example, the shoe is not required to complete Room 301 and may remain unused when you leave. I’ve added a gameplay note to clarify this, and I’ll improve the interaction cues and progression guidance in the next version. Thank you for the helpful feedback and for giving the game a try!