Kiril Manolov developed user experience enhancements for the Scratch Editor and Scratch WWW repositories, focusing on feature discoverability and interface consistency. He implemented a new extension-callout flow for face sensing, introducing a component that visually guides users to new functionality and tracks engagement via localStorage. In Scratch WWW, he added a parameterized preview component that displays guided feature callouts and refined overlay interactions using CSS and JavaScript to ensure accurate user guidance. His work emphasized maintainable, component-level UX patterns in React, enabling future feature rollouts with reduced regression risk and improving the overall onboarding experience for new and existing users.