Fran Bow may cause certain players (particularly, victims of abuse during childhood) to feel a sense of discomfort, or, even dread, as extremely troubling circumstances are mentioned.

The eponymous Fran ventures through worlds which can only be described as confining, nightmarish manifestations of a developing mind, as she attempts to cope with her own past traumatic experiences.

No that's pretty accurate :)

Why has nobody mentioned Commander Keen?
https://www.gog.com/en/game/commander_keen_complete_pack