Click on the following links to check Yo!Yumm Demo:

Front End: http://demo.yoyumm.com/
Merchant Area: http://demo.yoyumm.com/guest/login-form?type=merchant
Admin Area: http://demo.yoyumm.com/admin/admin-guest/login-form
Affiliate Dashboard: http://demo.yoyumm.com/affiliate/login
Delivery Staff Dashboard: http://demo.yoyumm.com/guest/login-form?type=delivery