Please close Doodly then go into System preferences > Security & Privacy. Under the Privacy tab, click on Microphone on the left. Once there, please check the list of apps within Microphone and make sure that Doodly is on the list and is checked.

After doing so, go into Accessibility on the left then make sure Doodly is on the list as well. If you do not see it, you can manually add it by clicking the + sign.

Once done restart your computer and try again.