Thanks for playing, or trying to, that is.
We tried to add a tutorial but didn't manage in time, unfortunately. What you do is the following; turn up the gas on the left side of the oven, then click the "Ignition" button until it, well, ignites. Then you take metal of the kind demanded in one of the orders on the right upper section of the screen (Iron=grey Steel=dark grey and copper, orange-ish) from the boxes on the upper left and place it in the oven until its red hot, take it out, place it on the table and use the hammer to shape it.
1x left click to flatten, 2x left clicks to sharpen and 1 right click to "pull" aka lengthen that part (to create a handguard or such)
Hope this helps ^^'