I unashamedly love Celeste, and I think this is a great port/demake/refactor for the SNES. I struggled with the controls a bit, but as feedback for my own game shows it appears I'm the outlier for how platform games should map controls on SNES.
It's a shame audio didn't make the cut as that really seals the deal on the vibe for this game, but I think you were wise to focus your efforts where you did and hopefully add audio after the jam!
Viewing post in Celeste SNES demake jam comments
Nah, I think your right to mention the physics, because the engine is effectively a complete rewrite and runs at 60fps in a 256x256 world, some things were approximated, particularly the integration on the jump arc/fall speed. could maybe have been made a wee bit more generous. I did start writing a sound driver, it crashed after 7 commands because of bugs in llvm-mos's spc700 code gen.