: You mentioned www.peperonity.com. This site and similar ones have been repositories for mobile content, including games, for various feature phones. You can visit, search for "Java games," and filter by device to find compatible content.
On Peperonity, you could filter by "Model: Nokia Asha 303" or "Resolution: 240x400." This ensured the JAR file had the correct key mappings for your physical keyboard or touch region. www-peperonity-com-java-games-asha-240x400
Based on download counts and forum threads from the peak era (2010–2013), these were the royal flush of 240x400 gaming: : You mentioned www