I've been working on this as a hobby to keep my mind sharp while I practice singing.
It's made in Game maker 8.0 (so legacy GM). I made it mostly on my own with help of some tutorials. It randomly egnerates simple worlds (not infinitely sized like minecraft, it's more like terraria in that sense). It can make three different world types right now, forest, snowy and desert. Although it is possible to add more biomes if I want to. It has the following features:
*randomly generated worlds.
*water, trees and lava
*goat mob, which can be hunted and have its meat cooked in lava to heal the player.
*inventory system.
*breaking tiles
*placing tiles
*crafting (although only possible to make a single thing, which is a floor tile.
*enemies that harm you
*meat items to heal
there are still some kinks to work out, mostly with the inventory, which sometimes randomly overflows to negative numbers xD