Code for crashing are really simple:
(to paste code into game, copy that and then press paste button in game)
\/--copy from below--\/
-- 7 Billion Humans (2059) --
-- 20: Обратная линия --

if s == 1:
comment 0
pickup s
step e
step e
step e
step e
step e
step e
step se
drop
end
endif
if s == 2:
comment 1
pickup s
step e
step e
step e
step e
step se
drop
end
endif
if s == 3:
comment 4
pickup s
step e
step e
step se
drop
end
endif
if s == 4:
comment 6
pickup s
step se
drop
end
endif
if s == 5:
comment 7
pickup s
step sw
drop
end
endif
if s == 6:
comment 5
pickup s
step w
step w
step sw
drop
end
endif
if s == 7:
comment 3
pickup s
step w
step w
step w
step w
step sw
drop
end
endif
if s == 8:
comment 2
pickup s
step w
step w
step w
step w
step w
step w
step sw
drop
end
endif


DEFINE COMMENT 0
eJzjYgACGQYDBnkGnQZdBiUGSwaFBiMGBwZNhiYGFYYZDfIMKxpkGXYwjIJRMAqGJQAAaf4Gvw;

DEFINE COMMENT 1
eJztyzsOgkAAhOH/DL4SkTVUhgQDiaLFVkJBRU04zlSegWxlLDyDpbVnsKTiFO4xKPZLppnJxIAWWJZc
teKkiIMyIpXsqcipfVfT6EavM3cdGZTyIOGF8dny1Brnv04bBnZ+NzgK3rrwkeVLw08tozomgiCYlT+F
oRtC;

DEFINE COMMENT 2
eJyTZmBgaFBgkGmQZ1BjUGAwYNBkaGrQZtgHxBcYtBmuNWgw3GFQBmIZhisMkgznGgQZNjEIMaxokGSY
AVRdwGDMkNFgwhDHYMbg0mDKYNNgxKDXYAg0S5tBAGgWD4M6A1eDMhArAvmjYBSMgkEHAPc4FXM;

DEFINE COMMENT 3
eJyTYAACLgYXBm4GlwYBBhsGEQaDBhEGDQZRBiMGCQY7BikGpwYZoLwSg1uDJpBtyGDVYMGg12DJoAXE
agyGDAEMWgxZDaoMTQ3SDA8apBjegYxkEGeoAZrQxTAKRsEoGNQAABWKD88;

DEFINE COMMENT 4
eJyTYwACQQYlBkkGKQZtBqkGQwY5BlsGtQYnBj0gdmJwYPBrsGaIYjBlSGIwZEhp0GPIYFBjyGpQYsho
kGGIA6qOAeqOA4qlNagz5ADVtDEYMfQA8YwGfYZVDLoMWxg0GfY1KDMcYpBgOMIgxnCggYdhHsMoGAWj
YFAAANEIFqM;

DEFINE COMMENT 5
eJztyL0JwmAYhdEzgKj4F1IIiiGIhYhjOISDWL2DiARLJ7C0srBMZSEW4iB+Y1h8B57i3hKxsrW0Vtko
7GJgHz2H6GhSN10Pfa2Rt4lPlL7mXhaeUWmjdle7pn0xczZ1isLRWGOYvizL/tYPkZwWOg;

DEFINE COMMENT 6
eJwTZgACBQY1BnkGPQZZBpMGKQaHBkGGIgYhhpoGYYYGBhmGDgZVhh6gbF+DCUMfgzmQDQK2DBZAbAck
sxpkGN4B9f1hGAWjYBQMOQAA4UgNPg;

DEFINE COMMENT 7
eJztjbEJwlAARN8S5mPAgMRGLcQQE8SgnYUTWDiKxdUOYO0AGcEZxELEwiqFc3iNM9j8B6+5g7shoEBq
CyXs7J7AgSlHCk5acFbNhSWtvarirpKXZnSM+ZDTKePNwFnfBp4kPNTjxm87JXM/0sQfcxpKGu+uWdkN
WyKRyN/4AolpHeE;
/\--copy above--/\
Wow comments are pile of information :D

but humbers from 1 to 8 should be replaced by in game numbers on top of coresponding box:
there 8 worker from right to left, 1 on left end, while 8 on right end. Under everyone a box with number - that number should replace worker's one, so it will check under it, then he/she can walk to place where box should be placed.
When they done and level completed, calculating time for completing show that all tests fail, and you have 0s averege time, then 7 Billion people crash.