Arnthak goes up on r/gamedev's Feedback Friday each week, but if you're impatient, you can grab the latest build:
(Note, this link will change each week, so don't hotlink to it anywhere!)
Current notes are as follows:
When it tells you to kill yourself, you should do so on a spike in the caves. You can no longer fall off the map (I think).
Default Controls are shown when you start a new game, but here they are just in case:
Note: Some of these are reconfigurable! If you accidentally bone them up, just grab keys.cfg from the zip file!
Note! If you enable the gamepad, you will need to press UP on it when you start a game if you decide to also use the keyboard (this is a slick thing, I have an idea to get around it but it's not included just yet)
If you tested for me and left some notes/comments, you should be in the credits. Hit me up if I have wrong details.