Session 9: Demo recording

Session 9 uses pure pygame. Show a GIF of the solution on the session page.

How to record

1. Run the solution: cd code/sessions/09-boss-battle/solution && python main.py.
2. Use a screen recorder:
   • Linux: Peek or SimpleScreenRecorder.
   • Windows: ScreenToGif.
   • macOS: QuickTime → export to GIF via ffmpeg or Kap.
3. Record ~20 seconds: go through all three phases and show the win screen.
4. Save as boss-battle.gif in static/sessions/09-boss-battle/.
5. Link to it in the worksheet via: ![Demo](/sessions/09-boss-battle/boss-battle.gif).

Target size: ~800×500 pixels, ≤ 2 MB.