Some of you have mentioned a problem in the tutorial. I have corrected this problem and added some small things to make the tutorial more enjoyable.
I also changed the Line Thickness resizer and Sustain Orb resizer to be generally slower as it was too strong initially.
I also added a drag and drop Delete Button so you dont have to physically press "Delete" you can instead drag the object(s) you want to delete over the trash can and let go of the mouse.
Thanks for the early support guys please contact if you find any other bugs.