First of all, i want to say that this game could be promising. It depends on what you're gonna do with the story and the game itself!
Then, It is kinda weird to play just one lvl with even a description.. It would be better if you explained that this is a trailversion of a game you're making..
And finally, a Mute button is always usefull :) or just put it in the settingsscreen :)
Good luck, this could become great game :)