Notan is a cross-platform Rust framework for building interactive 2D applications and games. It provides a modular architecture with a core app lifecycle, graphics abstraction (OpenGL/WebGL via glow), input handling, audio (via oddio), asset loading, and an immediate-mode 2D draw API with automatic batching. The framework supports native desktop (winit/glutin) and web (wasm-bindgen) targets, with a plugin system for extensibility and an egui integration for immediate-mode GUI. The codebase is well-structured into ~20 crates, each with clear responsibilities, and includes a macro crate for ergonomic shader compilation and state management. Despite its polish, the project is in slow maintenance mode as stated in the README, with infrequent commits and some unfinished features (e.g., commented-out instanced image code, TODOs in graphics pipelines). The dependency versions are relatively recent (winit 0.30, egui 0.31, glow 0.16), but platform-specific workarounds and scattered `cfg` conditionals indicate potential drift. The extensive example suite demonstrates real-world usage patterns, from simple 2D games to 3D rendering with instancing and post-processing. The framework's strength lies in its clean separation of concerns: a backend trait for platform abstraction, a plugin lifecycle for modular features, and a draw API that abstracts batching and tessellation. The asset system with custom parsers and the compile-time shader macro are standout components. However, the project's maintenance status and some rough edges (e.g., debug assertions, manual keycode mappings) prevent it from being exceptional. It remains a solid choice for developers seeking a lightweight, portable Rust multimedia layer.