How do I do BLJs in Project 64?

Same as anything else Long jump forward and then mid-jump hold back and mash a (or whatever your jump button is)

The same way you do them in the n64 version

Very carefully Kappa

if you need help doing it, theres a bunch of videos on youtube, or what i did, is to slow down project 64 using the + and - buttons, which makes the spamming easier