In addition to using the Habitica app on Zapier, it is also possible for Zapier to interact with Habitica by using its "Webhooks" app to contact Habitica's Application Programming Interface. This can potentially allow Zapier users to take actions not included in the Zapier Habitica app. For example, see The Keep:Scheduling Quest Starts with Zapier and API, which describes the use of Zapier's Google Calendar and Webhooks apps to start Quests automatically using API's "quests/force-start...
This is a theme for Habitica that changes the UI to something more comfortable to the eye, especially at night. I have tried to stick to the official colours of Habitica where possible. Tested on Chrome, should work on Firefox and Edge. This is a personal project and will be updated as such.