Add private_ in front of what they type in it or generate a random private room

When you are following someone and they start drawing while you are drawing it will create a huge line using up all of your ink.

Add a profile that shows off drawings people made
Let them add a little bio (markdown support)

Add an offline mode and package it for the chrome store

Split up the server into:

• RealTime drawing + chat
• Player server (ban, permissions, reputation, ...)
• Load Balancing server

Let every user create their own room that you can only draw in if they have given you permission
.
Maybe limited to 50rep+?

Add some black and white linedrawings that people can color together.

A lot of proxy give the original ip. Those should also be checked to see if they are banned.

Re-enable the gamerooms

Let users export a drawing as svg

Make it possible to somehow kickban people who recently left.

If node exits, send the drawings.

Create an image server that serves chunks. Every so often let the realtime server send the image server the drawings and discard them.

The client side code for this has mostly been added and only has to be uncommented and slightly changed.

Add people to a friendlist
Have a private chat
Invite them to a room (bypassing max user count)

Use an http code to determine transparency of the background image

New game mode proposal

There is a host that draws a picture and adds some text.
Then people vote on a choice. After a few votes or some time the host draws a new picture.
This way they can tell a story and go on an adventure.

45 seconds after someone joined, tell them that making an account is easy and allows them to collect upvotes

Maybe don't make it pixel perfect but add a 5px buffer

When pasting a color that contains no alpha information, keep the alpha slider at the same value

When a chat message is received, the title should change and there should be a small ding should (disableable)

A room where people with a certain amount of reputation can draw with limited ink that does not regenerate.

Might also want to add a timeout of a minute or 2 after the last interaction so that in case of server failure the amount of loss isn't too big.

Turn urls into clickable links in chatroom.
(especially for the room invite link)

Replace all

element.innerText = "text";
element.textContext = "text";

with

element.appendChild(document.createTextNode("text"));

Send coords even when not drawing

Indicate that the images collection on the front page is a static gallery. (http://peek.usertesting.com/result/41428951943251?autoplay=true)

Movable, zoomable
Share to reddit, facebook, ...
Gallery