So this really isn't exciting or major but I've finally worked out scaling size and positions of some UI elements when zooming:

And added the last boss before the game's final boss.  You ca nsee im having a hard time due to my lack of skills and some annoying thing with GMS's integration with spine 2d animation software.  Posted it in forum so hopefully i can get it fixed.

So regardless of your armor, lava is always instadeath unless you have lavaproof.

And below is a crude sketch for the final boss design:

And started on adding ingame tutorials given by your very own lil helper, Gizmo:

And finally added new weapon designs for the "final tier" ore, Galaxy Blade/Pummeler/Spear.