I have been working for the past few days on Windows tablet support for Monster RPG 2. This allows for playing the game with just a touchscreen (no keyboard/mouse/gamepad needed) on Windows. To enable this mode, you need to pass -force-tablet to the game as a command line parameter. To do this within the Steam client, right click the game in your library, select Properties then Launch Options, enter "-force-tablet" and save the options, then run the game as normal.
The build is now live on Steam at this link.