@Socha - this really is a sensitive topic, not just because it involves children, but because I think that a lot of us can relate to feelings of shame and humiliation when we look back at some of the things that we did as a child.
I'm in complete agreement with you when you say that if the "game" has one child not wanting to participate and causes shame and/or humiliation at the time, I'd struggle to see that as anything other than abuse.
My reading of
this scenario was that, at the time, the OP wasn't necessarily against the games (confused maybe, or maybe it just wasn't clear) and that the feeling of humiliation is something that was been felt retrospectively, as an adult looking back.
Here in Oz, little kids dancing round in their birthday suit after bathtime or under the hose on a hot day is waaay normal. I happily did that with my siblings, like millions of other kids around Australia. In retrospect, yeah, humiliating to think of. But not abuse.
So for those greyer areas, I think that labels and questions about whether it qualifies as abuse now that I'm embarrassed by it aren't helpful - my humiliation is valid, even if the application of the word "abuse" is unclear.