What GUI software/platform can I use to control my Arduino MP3 player over the serial port? How would I make a GUI program on a different platform to control my Arduino MP3 player using the Arduino's serial port.

I would like the GUI program to show images like this for 'start':



...and this for 'next':



And when I click the images I want this GUI program to write strings to the Arduino's serial port. I want to do this because I have create an Arduino music player where a song can be selected by typing 'next', 'prev' and 'start' into the serial monitor.

Instead of using the serial monitor, I want to make a GUI program that has buttons that will send 'next' when I click the next button and 'start' when I click the start button.
When interfacing the Arduino with other software, consider using Jubito.