Good job!
I really love the graphics and I think that the music and beeping really adds to the overall feel of the game :D.
I don't know if there is a way of winning the game but I always seem to lose which is a bit sad because grandma always die. Maybe adding a timer of how long it will take until the grandma is better and then the goal of the game is to save her, and as many other patients as you can in the process.