This is chibi chaos with zero mercy for pacing. The jokes come so fast you miss half of them the first time, then immediately want to rewatch because the rapid-fire gag structure means there's always something buried in the background or the next frame. It's built for the kind of viewer who laughs at the absurdity of a demon lord reduced to adorable proportions, then laughs harder when the show refuses to slow down long enough to explain why that's happening. Comedy this loose only works if you stop trying to predict the jokes and just let them hit you in waves.
Maou-sama, Petit Retry! is a comedy ONA made up of 23 chibi-style shorts spun off from Maou-sama, Retry!. The shorts first went out in 2019 through the series' official Twitter account. They present the parent show's world in a small, cartoonish form built for quick jokes, so they work best as a light extra for viewers who already know the main series.