Do a backwards full jump from somewhere around here: https://imgur.com/a/KCbY9O3
Then do a brief slowdown, jump and then hold right again quickly.
Then do a backwards full jump from somewhere around here: https://m.imgur.com/a/uVz5ELv
And then you should bop the koopa at the right time there, since Mario's hitbox will collide with the koopas hitbox while Mario is falling. Then jump over the last koopa and GG. It doesn't seem to be hard for me, and it saves some time so, go give it a try and share your thoughts about it!
I am pretty sure it's possible to jump on the 2nd koopa and reach the flag without slowdown there, but I always get All-Stars mixed up with this.
Does it line up the same without the spring jump though? Also hey, I hope you're doing well i_o_l (what do you prefer being called these days?).
Following investigations regarding the accuracy and integrity of FCEUX, the SMB1/2J moderation team has decided that FCEUX will not be permitted for future submissions, effective September 17th, 2023. The accuracy of FCEUX has come into question following 108Pi's discovery that the current SMB1 Warp