I don't actually know anything about GameMaker but right in the first level i have that error that won't let me go futher (i tried reloading the game, but it happens every time). If i'm doing something wrong, tell me
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ERROR in
action number 1
of Step Event0
for object player:
Moving to previous room before the first room.
at gml_Object_player_Step_0
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gml_Object_player_Step_0 (line -1)