This Website Turns Your Sketches Into Music

Someone needs to make Bad Apple!! with this.
You might've seen this little trend over the weekend, where scribbles turn into ambient tunes. It's a project by artist Tala Schlossberg called play_music_theory, which she describes as a "visual instrument designed to help us explore the relationship between sound and shape". Basically, it lets you listen to your drawings. Just open the website, draw using a simple pen tool and a few colors, then hit play.
It's free to use on the web, with paid app and one-time purchase versions with extra features. You can choose your key, set the beat and exact tempo, and export your loop as a WAV or MIDI file. Give the instrument a try here, then scroll down to see some examples:
You can also follow the project's official Instagram page for more.
Here's another website you'll probably spend way too much time playing with: JUNOTA's Gururi Paint, which lets you create your 360-degree illustrations:
Also, check out komm64's pixtube, a browser-based pixel art editor with a built-in CRT shader: