Cool game with an interesting concept. Could've been more polished, but good for what it is.

Got this error:

___________________________________________
ERROR in
action number 1
of Step Event
for object obj_player:

Error in code at line 9:
if (instance_position(x,y,obj_lines).neg_xmove_on = false || instance_position(x + 32, y, obj_lines).pos_xmove_on) = false {
^
at position 111: Unknown variable pos_xmove_on

Pretty funny concept. Took me a while to realize what I had to do.

I got the same error than Dikkop.
Interesting thing.