Hey. This is my first mod i made, when you run down the blocks and just jump, this is first,quite working, version but for sure not finished. I have few question, if you can help me please:

1) How to set gravity so that every time i open the mod it starts with -30 gravity? I have this there...
gamerule

engageplayerpos 1.5,0,46.00,-2.5,0,46.00
gravity 0,0,-30
matchframes 1500
...but only gravity does not work, others two commands yes
2)Even though i set the gravity to -30, it is not possible to run like in mod runningf, where the gravity is also -30. What else are the factors influencing the running?
3) is there a way, how to set default camera? the center of view is in between the tori and uke, but would be better if i could change it, so that it only follows the tori or uke.
4) any improving ideas?

Thanks for replies.