Ink Armada
A naval artillery duel drawn entirely in ballpoint pen on lined notebook paper. There are no image assets anywhere in it. Every ship, wave and doodle is drawn in code by a simulated pen.
Controls
Aim with the mouse, hold to charge your shot, release to fire. Arrow keys, Space and R also work, and so does touch.
How it works
The rendering technique is written up in the post about faking a ballpoint pen in Canvas 2D.
Prefers a new tab? Open the game on its own. It is a single 46 KB HTML file with no network requests, so it also works offline once loaded.