I made Noteheads to help my kids learn how to compose music, and to learn more about music and web development.
For now it's a hobby project, but I may take it further in the future.
Saved songs are backed up daily so links to your songs will keep working, and I'll try to keep everything running, but you might also want to export to MIDI or print off your creations either to paper or PDF just in case.
I hope you enjoy Noteheads, please send me your creations! You can follow me on Twitter: @majicDave
I'm a solo game developer by day, and my main project right now is a PC game called Sapiens, please check it out :) https://playsapiens.com