@jens going through my catalogue of #MSX games with 5yo #BeardGrabber, I've been running into similar issues, and especially those 80s and 90s games were mostly arcade–based or –inspired, and walking simulators weren't really a thing yet.
Yesterday I thought I'd found a nice game I remember playing myself quite a bit, #TheSnowman by #Quicksilva, based on #RaymondBriggs' book (https://frgcb.blogspot.com/2015/12/the-snowman-quicksilva-ltd-1983.html), which had only a moderate timer, and enemies would only eat the lump of snow you were holding, and not kill your character.
However, getting on and off stairs was tricky even for me, and I quickly discovered that kiddo struggled with staying on platforms; which apparently does kill you.
So many games that I think would be so much more playable for beginning gamers if they'd have an option to turn off the timer, enable invincibility, or toggle some form of no-clip, yet would still remain entertaining.