How to read the value returned by a powershell script with ansible

Question

I am trying the following Powershell script:

Function jello-code {
    return "jello"
}

jello-code

In Ansible playbook I have a task defined as

- name : run jello script.
  win_shell: C:Projects\scripts\jello.ps1
  args:
    chdir:  C:Projects\scripts
  register : script_return
- debug : msg = {{script_return.stdout}}

Currently the value shown by debug task is

ok: [clientmachine.com] => {
    "msg": "Hello world!"
}

I always get the same "Hello world!" message.

My goal is to do other tasks based on the value returned by the Powershell script.