In games, use Arrow Keys to control direction, and Space to jump/fire.
In some browsers, audio output is disabled until the first click, key press or touch.
Games usually require to press Space or 1 in the intro screen to start the actual game.
To load you own files, start one of the system emulators and drag'n'drop local files into the browser window. It's best to use the UI versions of the emulators for this because this allows you to enable and disable the joystick emulation as needed. See below for system-specific loading- and starting instructions.
When files are successfully loaded, the border will flash green for a short moment, or red when an error is encountered.
In games that require to select a joystick type, select Kempston.
The ZX Spectrum emulator supports the following file formats: