Cool game, amazing pixel art! I played it until the end. The browser version is not showing the fire particles, which makes the game look more fun when they're present. At some point, you could consider adding a new mechanic like a dash, which sounds fun to me. You might also want to add something to the gameplay that ties in with the name 'Fire Boy,' like collecting items to keep the fire from extinguishing. The warning signs are sometimes placed randomly and don’t show anything. Maybe use different colors for the enemies to create more contrast with the background. I hope you keep improving the game—congrats and have fun!