Needs Improvement
At least be able to readjust stats. Boss on the 21 day kept staying on top of me regardless of how I moved. I also notice the rock armor was not showing up. The controls need a little work on, especially if the user is using a labtop. It gets crazy fighting a spamming boss while waiting to attack those dig machines. Plus the molten core is a good idea, but at times it becomes more a problem than a helping hand. Especially if you have those iron worms on you and so close.
Frankly the game has tons of potential. A bit crazy after the 18 day. Though maybe have the keyboard function? If there is one, then I can not find it. Still good concept and reminds me of the shark on a mountain game. I'm pretty sure if a few fixes you'll saving yourself a lot of headache from users who are getting the 'iron worm' spaz anger.
Hope this was helpful to you!