Okay, that was my only quibble with it. If it went too fast it would takes away the fun drawback of his powers. He can do a lot of things, but he has to get up close to someone to do it. If it's slow enough to make a difference it adds to the decisions he can make, like forcing a ranged attack to deal with the ink snaking after them or trying to draw stealthily on something from a hidden position. 

Aka, looks good to me.