Okay so I added some boss level movement. Essentially when you get to the point that you can move to the top and bottom of the screen, you’re in the boss level area. Which means you can move all over it. You won’t see anything until you hit the wall on the right side. In the near future I don’t think I’ll allow you to a point of being able to see the right hand wall so that the boss level feels infinite. But I’ll need some way of making sure you don’t hit the wall once the game starts autoscrolling again.
As usual, arrow keys or wasd to move. Make sure to click in the window to use the controls. In firefox this just means left clicking pretty much anywhere.