diff --git a/PROPOSAL_20220552.md b/PROPOSAL_20220552.md
index 23a7692..401098c 100644
--- a/PROPOSAL_20220552.md
+++ b/PROPOSAL_20220552.md
@@ -92,3 +92,24 @@ The game will be organized into simple modules:
 - Movement constrained to a plane for simplicity
 - Objects managed using classes and arrays
 - Collision detection using distance checks
+
+## challenges & features
+
+### Expected Challenges
+
+- 3D rendering (camera, lighting, materials)
+- Implementing smooth body-following behavior
+- Managing performance with multiple objects
+- Balancing _visual effects_ and _performance_
+
+### Relevant Course Concepts
+
+- **Types and Variables**: used to store positions, score, and game state
+- **Arrays and Objects**: used to manage body segments, orbs, and obstacles
+- **Functions**: used to organize update, rendering, and interaction logic
+- **Modules**: used to structure the project into components such as `Player`, `Orb`, and `GameManager`
+- **Event Handling**: used to process user input (keyboard or mouse)
+
+---
+
+> This proposal was written with the assistance of ChatGPT for structuring and language support.