sanandres, it does have api you can tell by the green cord up in the upper right hand corner of the chat/game module. So stop talking about what you don't know.
You have it at a laggy 12 fps showing you are a beginner. Also this is teribble advice and would advice you to learn flash before posting terrible tutorials.
you should disable defualt mouse functions. I right clicked then clicked forwards through the whole game in 1 minute. It is only like 1 line of coding.
Art is not bad but very laggy. Did you put your framerate at 30 fps? If not do so and lower the movement speeds of the objects and mosquito. Otherwise very good game for a first time.