As big mario ducking, you can clip through walls as long as you enter the wall on the pixel seam between bricks - it's how you get to minus world as big mario, and it's how you do the "fast" 4-4 skip in warpless. Still pretty cool, and funny to accidentally do it in a blindfolded run.
More importantly, exciting you're attempting blindfolded! Good luck... I routed all the levels except 8-2, and did all the levels except 8-2 individually blindfolded. Those dang bullet bills are so unpredictable, and I could never find a way to get INTO the bullet section with any level of consistency.
I hope you can pull it off. Word of caution, I'd bend over backwards to prove that you're actually not able to see the screen. Probably even get in communication with mods to see what level of proof they will require before you start actually doing runs.
Effective immediately, any submissions using the SNES9x emulator will not be verified. The SMB1 mod team has concerns about its integrity due to its ability to overclock and remove lag frames, which may not be easily detectable. Additionally, we request that all BizHawk submissions avoid using the S