1. Show the timer for all the succeeding stacked pixels. Currently, you can only see the timer for the first pixel. I propose that the timer should be shown for all of the pixels in the stack, and not only the first.
2. A neat feature that r/place had was that you could click on a pixel and see the username of the account that placed it. I propose the same feature.
3. Consider creating a permanent canvas. It could be neat to see how a large, permanent canvas evolves over a long period of time.

If any of these suggestions require the modification of underlying code, and are not simple config changes, then I will suggest them upstream – please let me know.