Well, the graphics are great (Original minecraft style :3) But there could be next stuff:
-Cherry tree (that gives you cheerys instead of apples)
-The christmas tree (would have cube decorations on it)
-Fish (that could be seen in water)
-New sort of piston (that is originaly turned on, and it closes when u press the button)
-Animal armor (like puting helmet and shoes on a pig xD)
-Magnet (that would suck xp and destroyed block, or zombie flash to you from longer range)
-A crossbow
-Tombstone sign (you know, the sign that is made of stone, and placed on ground, where it ussualy says: "here lies Mr.Cudless" or something)