Need help with permissions for public app- confused...

Need help with permissions for public app- confused...

I have a public app:  http://creator.zoho.com/redatomnetworks/ sportspenguin .  The app will allow someone to list a good to be donated so others can get it.  e.g. donate a chair for free and others can see the chair listed and contact the person to get it.

I want to open it up for anyone to use without logging into Zoho.  They need to be able to submit and edit their own forms.  I dont want them to be able to delete forms at all once submitted.

I also want to hide or prevent access to the Admin views in the tabbed interface.

Only the admin will have access to all forms and views.  Also- I dont want the app to be copied.

How can I set this up?  I am confused by the settings for this type of implementation.