... you need a kickstart rom... ... here's a step by step guide once you have it
1/ load up winfellow
2/ press configuration
2a/ Display: true color (32 bit), 640x 480, full screen, line mode> doubled -exact, ECS, original blitter speed - all other boxes are unticked
2b/ Sound: Play sound, 44100Hz, filter- original, stereo, 16bit (all others unticked)
2c/ CPU: 68020 7Mhz
2d/ Memory: Chip 1024 (thats 1mb), press on the ... to the right of "image" and select your kickstart image, for moonstone / older games kickstart 1.3 is recommended. (leave everything else as default)
2e/ Gameport: choose everything how you would like.. I guess
2f/ OK (confirm configuration is ok), then push menu> file > save configuration
2g/ put Moonstone disk 1 ADF into the first DF0: by clicking on the ... besides DF0:
... press "Start Emulation"
.. whenever you like to switch disks, push F11, then "..." next to DF0: and select the next disk
... hope this helps