Clear and concise feedback

1. Player Motivation vs Player Satisfaction (Player-Centric Gamification Tips)
2. Gameplay Mechanics vs Player Mechanics (Gamification Player Progression Tips)
3. Player Expectations vs Player Satisfaction (Gamification Player Progression Tips)
4. Progression System vs Achievement System (Gamification Player Progression Tips)
5. Task Completion vs Level Completion (Gamification Player Progression Tips)