Was actually pretty interesting. I tried to let black get to an evaluation depth of 24 most of the time. White I just pushed whatever pawn it picked, except one time I took a free bishop and it was evaluated as a game losing blunder, so yeah engine definitely can't handle this properly. Most of the time black just scooted around its own side, but it occasionally sacrificed a piece that messed up the pawn structure and let it take 2 or 3 total. The king also danced around preventing promotion and ended up capturing like 5 pawns himself. The wall was simply too much to handle though and as soon as the king was pushed out of the corner it was mate in 15.