Dye your bed a different color.

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.

Wear a full suit of Iron Armour.

Use planks and sticks to make a hoe.

Construct an Enchantment Table.

Die 5 times

Kill 1000 enemies

Beat highscore of 250,000

Kill 3 bosses

Destroy 100 meteors

Kill 500 enemies

Collect 10 cocos