Multiple choice field - need selection to be completely filled in - no checkmark

Is there an option to completely fill in the bubbles in a multiple choice field rather than a checkmark?  

For example:

Thank you!!

Yes, this is achievable on your form named "Remark TEST form", by injecting the following custom CSS into it:

.form-checkbox-item:not(#foo) input:checked + label::after {
    box-shadow: none;
    width: 18px;
    height: 18px;
    top: 0;
    left: 4px;
    border-radius: 10px;
    transform: none;
}

You can inject custom CSS into your form by following this guide:

https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

And this is how your form would display (black circles are the selected ones):

Please try it out, and let us know whether you need further assistance. Thank you.