Coming back to this after the fact, I apologize for how quiet the audio is. I had been streaming Silent Hill 1 and 4 with me commentating, so I didn’t adjust accordingly for this.
Another thing i just found: in the start of Volcanic 2 you can jump from that left platform directly to grab the ledge in the right platform, thus don't need to push the boulder down.
hey! nice run! I'm researching this game to make a TAS in the near future, there's a lot of interesting stuff. A new trick for you: you can activate those springboards with your bowling balls even when standing on it, just stand on the most right of the springboard, turn left, throw, the hitboxes will do the job. This seems useful in the start of Machine 1, where you go right to spawn the dino-hog.