So first there's no bar at the top that goes

File... Open.... Etc.

That's standard in most windows applications. I would like the next release to have that.

In addition, you cannot select rectangles that are custom width/length, you can only select individual measures

there is no individual volume control for each of the different "instruments"

there is no action to pitch-up/pitch-down notes/selections of notes

there is no way to extend a note for more than one beat

and there are no keyboard shortcuts for any of the functions the app already has

lastly, do you have a roadmap of some kind detailing how you will develop the application in the future, and what features you're prioritizing when?