Can you please update it?, here are some ideas :) .
1) You should add a storyline with more detail about what's going on.
2) Maybe add like a health and pet system?.
3) Selling things/ maybe like a trade system? :).
4) Add a sandbox.
5) Doing something else accept building,crafting and traveling :3.
6) Traps for: Creepers (already in-game...) (occelot trap), Ender man (The End only) (water trap), silverfish (falling sand trap?), Zombie (already in-game (villager trap), Spider (already in-game) (lava trap?)
, Skelleton (already in-game) (poison trap), Spider jockey (arrow trap idk lol), ender-mites, (also water trap), (giant hole with lava?), magma cube (giant nether hole) and blaze (also...water trap).
7) Bosses like the wither (Overworld), king zombie pigman (not in minecraft) (Nether) and the ender dragon (The End) if you add the end :3.
8) More realms (have the nether somewhere else) The End and sky lands :3.
9) Add moduals (mods) (add a scripter villager).
10) Enchantments.
 "Transmission"){kind=icon}
 "GrindCraft"){kind=icon}
 "Depict1"){kind=icon}
 "Tangerine Tycoon"){kind=icon}
 "Idle Tree"){kind=icon}
 "The Last Door Ch.4 - Ancient Shadows"){kind=icon}
 "Just Type This"){kind=icon}
that one will be in the next update.