This is a demo version of the game. 

The guide:

You can start by clicking the start button, once you've started you can type . Or - on your keyboard or you could just click the buttons on the screen.

there are 2 option button on the screen, one is the audio mute button on the top right corner, the other is the return to the menu button on the middle top of the screen.

Note:

the game is based on a you can only learn by failing mechanic, so you have to fail in order to memorize the morse code.

feel free to  leave a feedback.