Notice
We're working on a bot which will fill out the wiki automatically from the game's code. It's next version will automatically fill out the Item Template. So the item and enemy pages don't have to be created by hand.
What to do
If you want to help but don't know what you can do, here are a couple of things you can do:
Templates
We use a number of templates on the wiki for various purposes. Such as the {{Menu}} template for the menu at the bottom of the page.
Versioning
We have created a system of templates to mark which pages are up to date. At the top of every page there should be a template for which version the page is written. For example, if a page is written for version 0.09.2 you would add {{v0.09.2}} to the top of the page. Each page should have a version attached to it. Every version can be found in the Versions Category. One of the main tasks is to make sure that pages are up to date.
You can view the versioning system in action on the top right corner of this page.