Do not buy this unless you hate yourself and/or like typing for long amounts of time.
This is not a game so much as it is interactive performance art, and it is definitely not for everyone. There is no shame in admitting this is not for you. Don't say you haven't been warned.
HeatStroke combines the tedium of Desert Bus with the tedium of transcribing a book, except there is no escape and God is cruel. There is no save function. You get 900 seconds of break time (15 minutes) and that's it. I hope you can type fast, because I thought of myself as a relatively fast typer and still took four and a half hours.
For the last few chapters the sound of your wheels crossing the middle of the road also mostly gets drowned out by the music, which really sucks when you rely on that for steering. Steer too far off the road and it's back to the main menu with you.
Bid your loved ones farewell, prepare snacks, empty your bladder and bowels before and keep your calendar free for when you want to do this to yourself. Get your affairs in order. Wear comfortable clothing. You will be here a while.