I liked this a lot narratively, nice short little visual novels, didn't encounter any weird Ren'Py in browser bugs that I know can sometimes occur when a game is on the itchio Browser.
I really liked what you did here, the idea that it's you last moments of your grandfather's life as you are learning how much he still cared about you is really poignant, I was voice acting on stream and kind of went quiet saying the protag's lines because I couldn't quite emotionally make myself say some of them fully, so I think even in this short little scenario, it still got to me.
I think that there is a bit of a clash between the idea of the timer and the atmosphere of the game. I don't know if it's intentional, but the melancholy of it feels a bit lost when you're rushing to read everything in the room. I also didn't get booted out to the title screen properly when I only half finished reading everything in the room, and so I ended up reading through everything else, then clicked on everything after reloading to title screen and just mashed through the text, and ended up having to just wait for 2 minutes after not quite sure what to do as a result.