Same seed, same brain: pymunk-reference μ=0 (left) vs pymunk-wall μ=0.5 pusher/block friction (right)

seedpymunk-reference (frictionless, published)pymunk-wall (contact_friction 0.5)
428SOLVED at 70 · coverage 0.954 · 2°→2° · 59→1 px · 3 boutsSOLVED at 70 · coverage 0.955 · 2°→2° · 59→1 px · 3 bouts
422SOLVED at 195 · coverage 0.961 · 75°→1° · 103→2 px · 5 boutsnot solved · coverage 0.890 · 75°→6° · 103→0 px · 7 bouts
787not solved · coverage 0.901 · 18°→5° · 18→1 px · 4 boutsnot solved · coverage 0.927 · 18°→4° · 18→0 px · 5 bouts
412not solved · coverage 0.298 · 167°→75° · 32→8 px · 5 boutsnot solved · coverage 0.353 · 167°→98° · 32→3 px · 5 bouts
577not solved · coverage 0.923 · 2°→1° · 173→3 px · 3 boutsnot solved · coverage 0.924 · 2°→1° · 173→3 px · 3 bouts