My fork running tic80 instead of chrome.

kiosker.sh

#!/bin/bash

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

echo 'user ALL=(ALL:ALL) ALL' >> /etc/sudoers

cat <<EOT >> /opt/kiosk.sh
#!/bin/bash

xhost +
xset -dpms
xset s off
matchbox-window-manager -use_cursor no -use_titlebar no &
start-pulseaudio-x11

while true; do
    rm -rf ~/.{config,cache}/google-chrome/
    tic80 --fullscreen --fs /home/tic80-data --vsync

    sleep 1s
done
EOT
chmod +x /opt/kiosk.sh

cat <<EOT >> /lib/systemd/system/kiosk.service
[Unit]
Description=Kiosk service
After=network-online.target

[Service]
Restart=always
User=user
Group=user
ExecStart=/bin/bash -ec "xinit /opt/kiosk.sh -- -nocursor"

[Install]
WantedBy=multi-user.target
EOT

sed -i -e 's/allowed_users=console/allowed_users=anybody/g' /etc/X11/Xwrapper.config

systemctl enable /lib/systemd/system/kiosk.service
systemctl start kiosk.service