2D Game Development
Principles for 2D game systems.
1. Sprite Systems
Sprite Organization
| Component | Purpose | |-----------|---------| | Atlas | Combine textures, reduce draw calls | | Animation | Frame sequences | | Pivot | Rotation/scale origin | | Layering | Z-order control |
Animation Principles
- Frame rate: 8-24 FPS typical
- Squash and stretch for impact
- Anticipation before action
- Follow-through after action
2. Tilemap Design
Tile Considerations
| Factor | Recommendation | |--------|----------------| | Size | 16x16, 32x32, 64x64 | | Auto-tiling | Use for terrain | | Collision | Simplified shapes |
Layers
| Layer | Content | |-------|---------| | Background | Non-interactive scenery | | Terrain | Walkable ground | | Props | Interactive objects | | Foreground | Parallax overlay |
3. 2D Physics
Collision Shapes
| Shape | Use Case | |-------|----------| | Box | Rectangular objects | | Circle | Balls, rounded | | Capsule | Characters | | Polygon | Complex shapes |
Physics Considerations
- Pixel-perfect vs physics-based
- Fixed timestep for consistency
- Layers for filtering
4. Camera Systems
Camera Types
| Type | Use | |------|-----| | Follow | Track player | | Look-ahead | Anticipate movement | | Multi-target | Two-player | | Room-based | Metroidvania |
Screen Shake
- Short duration (50-200ms)
- Diminishing intensity
- Use sparingly
5. Genre Patterns
Platformer
- Coyote time (leniency after edge)
- Jump buffering
- Variable jump height
Top-down
- 8-directional or free movement
- Aim-based or auto-aim
- Consider rotation or not
6. Anti-Patterns
| ❌ Don't | ✅ Do | |----------|-------| | Separate textures | Use atlases | | Complex collision shapes | Simplified collision | | Jittery camera | Smooth following | | Pixel-perfect on physics | Choose one approach |
Remember: 2D is about clarity. Every pixel should communicate.
When to Use
This skill is applicable to execute the workflow or actions described in the overview.
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.