Rectangular Birthday Cake With Sprinkles

I decided to make this cake for my daughter for her 22nd birthday. She was recovering from surgery on her leg and couldn't go out to celebrate so I brought the celebration to her.

I didn't use a special pan, just a regular rectangular cake pan. I used her favorite Betty Crocker cake mix (yellow cake) and icing (cream cheese) and just prepared the cake based on the instructions from the box. She didn't want anything special but I tried to spruce up the cake by adding sprinkles to the top.