! { t } [ <default-sokoban> { 1 1 } can-move? ] unit-test
{ t } [ <default-sokoban> { 1 1 } sokoban-move ] unit-test
! { 1 } [ <default-sokoban> dup { 1 1 } sokoban-move drop current-piece location>> second ] unit-test
-{ 1 } [ <default-sokoban> level>> ] unit-test
-{ 1 } [ <default-sokoban> 9 >>rows level>> ] unit-test
-{ 2 } [ <default-sokoban> 10 >>rows level>> ] unit-test
+{ 0 } [ <default-sokoban> level>> ] unit-test
+! { 1 } [ <default-sokoban> 9 >>rows level>> ] unit-test
+! { 2 } [ <default-sokoban> 10 >>rows level>> ] unit-test
! { 0 } [ 3 0 rows-score ] unit-test
! { 80 } [ 1 1 rows-score ] unit-test
! { 4800 } [ 3 4 rows-score ] unit-test