To answer the question, yes a white mushroom house will spawn in 1-4. 44 coins minimum pickup is required. =]

In 3-5, you jump off a block with a chain chomp in it. You should have taken damage, but this game.... It doesn't like mods [quick swapping power-ups] or proper hitboxes =P thank you fren.

first attempt at viewing had the video error out, downloaded and watched back in entirety.

Pacifist Tanooki. Already has two completed runs with video evidence from two different people. Caylak with 27m20s - Doctor_TP with 25m 59s -

Rules can be found in my discord or here: https://pastebin.com/aVui10BY