I had this idea for a silly game - I wanted to learn about HTML5 Audio.
It is based on keyboard input, so won’t work on your phone.
I’m also interested in fun game mechanics. As a developer, there is a real pleasant joy to tapping the keyboard. It provides nice tactile feedback - I often wish I had more to say since I enjoy typing so much (this is part of the reason why I use vim.
Additionally, I used phaser.io which is my favorite js game engine because of it’s ease of use and well designed API.
Generating a pleasing random color is slightly more challenging then just picking from the color space. Rather than actually figuring it out, I used this Random Color generator from github.