I use Phaser 3, since its open-source libraries are included within Github Copilot. It takes a bit to learn the limitations, especially when working with AI tools, but the payoff is absolutely worth it! I also use AI tools like Suno ($10/month), which creates the music for my games, and PixelLabs AI ($24/month) to create my animations and characters. In “KickBrawl: World Tour,” I even used Google Gemini to create the backgrounds needed for the game (on the free tier, nonetheless, thanks to a free trial from Coursera’s Google AI certification course).