i have been working again on the watch a few days ago till now, with 2 main things in mind: framebuffer and extending the battery life
i succeeded in both, mainly in battery life: 370 hour standby (17 hour runtime @ 24mhz) time (no accelerometer yet) (total powerdraw: 1.35mA)
which is like 15 days of standby on a 500mAh lipo!
right now i am working on porting all graphic commands to use the framebuffer.
only downside of the framebuffer is: it consumes half of the teensy 3.2's RAM.
but thanks to rossum's microtouch framework we can still have 9kilobytes of RAM for apps, which is 1/8th more than an Arduino mega!
also, cool thing of the framebuffer is: alpha blending is possible, and some people might have seen a video of me demonstrating it. but for those who didn't, here's the video: