i would like to assist on point 3 and 4: the speedrun level is suposed to just try out a few mechanics and complete it as fast as posible, it is a "free" level. Point 4 is accompanied by the description, that is a bug and you have to restart the level, if you still need assistance, don't hesitate to reply, or check the walktrough here: https://youtu.be/fvCJeUDNCp8