There are several websites where you can make online games for free. Here are a few popular options.
1. Scratch (scratch.mit.edu): Scratch is a beginner-friendly platform where you can create interactive stories, games, and animations using a block-based programming language. It's widely used by educators and students to learn programming concepts while having fun.
2. Gamefroot (gamefroot.com): Gamefroot allows users to create their own platformer or top-down games using a drag-and-drop interface. It offers various templates, art assets, and a simple game editor to bring your ideas to life.
3. Construct 3 (construct.net): Construct 3 is a powerful game development engine that requires no coding knowledge. It uses a visual scripting system and allows you to create browser-based games. While it offers a free version, some features and assets may require a subscription.
4. GameMaker Studio 2 (yoyogames.com): GameMaker Studio 2 is a popular game development engine that offers a free trial version. It uses its own scripting language called GameMaker Language (GML) or a drag-and-drop system for visual game creation.
5. Unity (unity.com): Unity is a professional game development engine widely used in the industry. Though the full version isn't free, Unity offers a Personal Edition that allows you to create and publish games for free as long as you meet their revenue criteria.
These websites offer different levels of complexity and flexibility, so I recommend exploring each one to find the platform that suits your needs and skill level best.