I really like this, it's impressive how much you've packed into it. It does crash periodically though, and I wish the crank scrolling was smoother, the way it starts and stops is finnicky. I would also love an option to add swing.
Thanks for your support. I used PocketBM for a few days to make the BGM for my game last month and didn't experience any crash. Can you provide me with more details of the crash? For example, what were you doing when the crash happened? I will take a look of the crank scrolling code and see if I can improve on it. I will also check out if I can add swing.