Current update (yesterday) still getting errors. Practice mode, vs enemies, easy. Within a few levels I get the following error. This one happened at the first boss level. Let me know if you need logs or save files.
Edit: happens reliably within the first five levels. The next time happened on the second level.
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ERROR in action number 1
of Step Event0 for object obj_control:
Variable obj_ficha.down(100563, -2147483648) not set before reading it.
at gml_Script_scr_search
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gml_Script_scr_search (line -1)
gml_Object_obj_control_Step_0