* 2.0 version stabilisation

Improved playback keyboard sync

Optimised the general performance speed

Adjusted the volume of the crash cymbal

Added 'Remove Ad' feature

Revised exporting while in the dark mode

Revised the loop limit

Revised drawing bar line automatically

Revised pedal

Revised metronome misbehaving under a certain condition

Fixed crashing issue for some devices

* Polished here and there and fixed minor bugs for some devices