This is an interactive escape room-themed application centered around pen nib maintenance oil. The entire experience is wrapped in a mysterious atmosphere with deep gray, dark crimson, and dim golden tones that evoke the feeling of an underground vault. The app features three escape chambers where players must select the correct oil viscosity, arrange ingredient sequences, and crack combination codes to progress. Beyond the main game, it includes an Oil Mixing Laboratory for experimenting with eight different ingredients to create custom blends graded from S to D, a Pen Nib Diagnostic tool that performs two-phase symptom analysis and generates detailed health reports with treatment recommendations, and a Recipe Decoder with four cipher puzzles of increasing difficulty that reveal hidden oil formulas when solved. Every screen features aged parchment cards, keyhole decorations, flickering candlelight effects, and smooth transition animations for a fully immersive puzzle-solving experience.