ExtraPulp is a Chrome extension that unlocks PlayDate Pulp's hidden 16x16 tile mode, so you can make games at the PlayDate's native 400x240 resolution instead of the normal 200x120.
Source code
To install, download the source and follow Chrome's instructions for loading an unpacked extension.
How this works:
The Pulp editor actually supports configuring the tile size and scale factor in the source code:
var tileWidth = 8;
var tileHeight = 8;
var editorScale = 2; // TODO: remove me, we're not supporting this, it gets too hairy
It looks like full resolution support was planned during development, but removed. This extension simply forces tileWidth and tileHeight to 16, and editorScale to 1.
Known issues
The .pdx probably won't run - I don't have a patch for the Lua inside the .pdx yet. Since the engine in the online preview does work with 16x16 tiles, and that's just the Lua translated to JavaScript through lua2js, I'm confident that it's possible to patch it.