This run had some avoidable mistakes but otherwise hit all the major time saves and had decent rng with combat. It uses a bug with loading an act prior to starting a new game. The game incorrectly retains some flags/game state from the loaded act, letting us bypass a few portions early on. The largest time saves are: we can go to the forest in act 2-1 (as if we were in act 2-3 and had already acquired the roach morph), no combat in act 2-5, and skipping picking up the goldfish morph in 3-2. Aside from that, this run uses various tricks to gain control early or outright cancel cutscenes to save time, and it takes a couple shortcuts in squirrel vents by clipping through the ceiling.
Next up: trying to get sub 1:20, which might be doable with a mistake-free run with really good rng.