Creepers have 120ft of Darkvision. 

The Creeper gains proficiency in the stealth skill. While a Creeper is in a green area, a Creeper can hide when they have light/partial cover.-

Creepers are frightened* of Feline creatures and have disadvantage on attacks made on Felines, who, in turn, have advantage on Creepers.

Frightened condition:

A frightened creature has disadvantage on ability checks and attack rolls while the source of its fear is within line of sight.
The creature can't willingly move closer to the source of its fear.

The Creeper can explode a number of times per day equal to your proficiency modifier. The charges reset after a long rest.

When the Creeper explodes, any creature within a 15-foot radius must make a Dexterity saving throw against a DC of 10 + your Constitution modifier. On a failed save, the creature takes an amount of d6's equal to your proficiency modifier. If the Creeper is hidden, the damage dice are increased to d8's for that explosion.

When the Creeper is knocked unconscious it explodes as well.

When the Creeper takes thunder damage, the damage dice are increased to d8's. If a Creeper is already hidden, add an additional damage die.