

Yep. Getting hit means you are burned.
Back when I was a kid, polttopallo was always what the US calls “Circle dodgeball”, and not the team variant. We have one like that too, with the twist that when you get hit, you run behind the opposing team and can start throwing them in the back. It’s called Kahden Tulen Välissä - between two fires.
In Sweden they have a variation called Killerboll. You probably don’t need a translation for that :)
Yes. Directly if you have root, or with a workaround where you bring up the power menu and then use either virtual keyboard commands or the AutoInput plugin to tap the reboot button.