I found ways to beat every level dashless. Only problem is the fact that 1900 is insanely precise. At the time of writing this, I have spent well over an hour with 1000+ deaths only to 1900 dashless. My hands are starting to hurt a bit so I'll stop here for today. if anyone is interested in trying dashless themselves, I recommend trying to get the "second half" of 1900 consistently first. I managed to get near the end one time only and then died because i missed the jump like 20 times and then fell into a spike.
Edit: Despite all the "mental pain" dashless causes me, I really enjoy playing this (even got golden fc) and I'm absolutely hyped for the other levels.