**30-Second Knock** is ready!

**Core Features:**
- **Peephole mechanic**: Look through the peephole to see visitors before deciding
- **Real vs Fake detection**: 3 real visitors (neighbor, delivery person, elderly man) and 4 fake/monster types
- **Sanity system**: Wrong choices drain sanity; opening door to monsters causes -25%, missing real visitors -5%
- **Time pressure**: 10-second decision window with countdown
- **Escalating difficulty**: Knock interval decreases and fake chance increases each round
- **Atmospheric horror**: Ambient drone, heartbeat tension, flickering lights, screen shake

**Controls:**
- **Tap/Click** the peephole button to look through
- **OPEN** if you think they're real
- **IGNORE** to banish fakes
- Keyboard: **SPACE** to peek, **O** to open, **I** to ignore

**Next Ideas:**
1. **Story Discovery Mode** - Add collectible notes/items from real visitors that reveal why the apartment is haunted
2. **Progressive Sanity Effects** - At low sanity, add visual distortions (screen warping, hallucination visitors, reversed controls)

**Ready to level up your game? Pick one and let's build it!**