Now, that everyone that owns a Switch can launch their own 'frozen rockets' via an USB-C connection and shorting the pins 1&10 on the right Joycon rail, why not have some fun with it, and that is just what scene developer @LetsPlentendo has decided to do, a payload that does nothing, but display your own custom image on the Switch display screen when launched.
How to use
use the convert_image.pde tool (you'll need Processing) to convert an image file to a text file. Place image.txt on the root of a FAT32-formatted SD card and insert it into your Switch. Compile the project, enter RCM mode and use fusée-launcher to launch the program. Enjoy!
Update v0.2:
I've been optimizing the program, and now it can display a fullscreen image (1280x720) not in 4 minutes, but 3 seconds! I've also remade the image converter program in Python. If you have any suggestions, I'd love to hear about them!