I'm glad to hear that my feedback helps! :)
Lighting is too dark imho at tutorial almost everywhere, i'll try to attach some screenshots with default setting and how i changed it:




About #9 i'll try to attach my paint concept as well, it would be cool to understand if i'm speeding up or slowing down atm. Even tho only one time i feel i can use it to understand how fast i'm slowing down from sliding, have not even checked it yet

Thanks about info about Low Latency, i'll prob try it out
About double dash - it's best to try at Tutorial at very first jump. You can see it at start of my last record, so you should jump and while you are falling you should be a little bit lower of a platform you are approaching with first dash, then it should let you do second dash (just start to spam it at some point tbh :) ) without cooldown as usual. I could replicate it at some places at Course as well:




