In multiplayer, whenever one beeps the horn, the other player should be able to hear it. I have 2 cars. One is the white sedan and the other one is the orange hatchback. They both have the same horn! You should and different and unique horns for each car. Also you should add night time and even rain! Your driving games are so creative! I also have Dr. Driving on my smartphone! They are both awesome!
Deedee39 about Dr. Parking 4, v1.08