Show HN: bigdraw, a big shared canvas anyone can draw on

Hey - bigdraw is a little project I've been working on which lets strangers to draw together on a shared canvas. No signups required - just click on a tile to claim and draw on it. It's inspired by r/place, One Million Checkboxes, and JSPaint.

The backend's a Go+SQLite server that handles submissions and generates map tiles (think OpenStreetMap). This lets you zoom out to see tens of thousands of drawings on one screen. In theory... there are only a hundred or so drawings so far.

On the frontend, 2D canvas is used for rendering the "map" tiles and the grid. The fog is rendered with WebGL. I wrote more about how bigdraw works here: https://alexplescan.com/posts/2026/07/07/bigdraw/

I'd love any feedback, but there are two things I'm particularly interested in:

Thoughts on handling drawing on touch devices, where by their very nature your finger obscures exactly what you want to see the most: where and what you're drawing!

Moderation is a concern. I want to keep user anonymity, but also keep bigdraw a nice place to be - and the two can be at odds with each other. I've added crowsourced tile reporting and user/IP blocking, but those seem like short term strategies.

Thanks for reading and checking out bigdraw :)