I'm curious, what are the differences between version 1.3.1 and version 2.0 of Bonds?
It's probably easiest to just refer you to the change log: https://did-games.gitbook.io/bonds-modding/patchnotes/update-2.0.0
But some of the main highlights of the 2.x.x updates are things like the game being ported to the MZ engine, Chinese translation being added, controller support, mod support, QoL improvements etc