Nice!
Here's my version of a kindle dashboard I set up several months ago (https://github.com/thekakkun/kiiin). I use it to show local weather data and music data from my media server.
As for the "color bleed" (I assume it's ghosting) you mention, periodically using `eips -f` when drawing the image to force a full screen redraw should help.
Woww written in Rust, nice! Very cool, first time I've been tempted to learn Rust.