Megan here from Cat Tap with a quick process video of how I create GUI assets for the game.
For icons, I like to work on a 2048 x 2048 canvas size with a resolution of 300 to ensure clear quality in Unity (the resolution can always be lowered in unity if your file sizes are getting expensive).
Software:
Adobe Photoshop CS6
Music:
PACIFIC SUN by Nicolai Heidlas Music / nicolai-heidlas
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
http://creativecommons.org/licenses/b...
Music provided by Audio Library • Video