I have updated the demo of Engineer Alpha to the latest version. It had been over a year since it had been updated so it was past time. The demo will likely not be updated for a while again but hopefully not as long as before. If there are any significant gameplay changes the affect the demo (which is limited to the very early game) I will hopefully get a new version of it out.
In other news I have started working on a handheld mining drill for the mass removal of blocks. Manual tools like pickaxes and shovels were always intended to be the more precise way to remove blocks from the world and if you wanted something faster and a bit less precise that would be an option. The Hand Mining Drill (Name Not Final) is an item you will first research somewhere around mid Iron tier. It will never be consumed so you should only need to craft 1 (unless you lose it) but it will have an energy requirement tied to using it such as burning coal. The hand Mining Drill mines fast, up to 20 blocks every second if the blocks you are mining are weak enough. The Drill has a ramp up time when you start using it before it reaches max speed where it will not be nearly as effective for several seconds. If you stop using your drill its speed will slowly go down.
The visuals of the Drill are not yet complete but the back end is mostly done if you would like a little preview of the drill check out the video below. The hand mining drill will likely be coming in the next build soon.