I'm thinking of building a simple game like this(but not with shooting stuff) using node on the server side since it's the cool thing to do now.
But idk how many players a server could sustain or if the browser client might slow down when rendering many players on the screen.
Anybody want to help? Should just take about a week to build something playable i think.
Here is a sceenshot in case you break the (free) hosting:
http://i.imgur.com/vpIeG.png
The basic idea is that you have automatic scrolling of images and you can select a speed 1-5.