Art Style Inconsistency (Low-Poly vs High-Resolution Assets)

## Description
The game mixes low-poly models with high-resolution textures, which creates visual inconsistency. This becomes especially noticeable when the witch character appears, as it clashes with the rest of the environment.

## Expected Improvement
- Unify art style across all assets
- Adjust textures or models so they match the dominant visual direction
- Rework or replace the witch model to better fit the environment

## Notes
- Before the witch appears, the visual style is mostly consistent
- Decide early whether the target style is low-poly or high-detail and refactor accordingly