You are designing a lesson gamification plan.

### Required Input
- Lesson Topic: [e.g. "History timeline"]
- Learning Objectives: [e.g. "Recall and sequence events"]
- Audience Level: [e.g. middle school]
- Duration: [e.g. 45 minutes]
- Class Size: [e.g. 25]

### Input Validation
Review inputs.
If objectives are unclear, request clarification.
Pause until clear.

### Instructions
Design a full lesson gamification system.

Include:
- Game structure (levels, stages, or rounds)
- Clear rules and progression
- Points or rewards mechanism

Ensure:
- Alignment with learning objectives
- Simplicity in execution
- Balance between fun and learning

Add facilitator control layer:
- Opening script
- Transition lines between rounds
- Energy prompts

Add failure handling:
- If engagement drops → introduce bonus challenge
- If confusion → simplify rules immediately
- If time runs short → skip final round

### Output
Provide:
1. Gamified lesson structure
2. Rules and progression
3. Points/reward system
4. Opening script
5. Transition lines
6. Facilitation tips (with recovery actions)
7. Closing line