The assets are nice.  cant quite see where you are going with the idea, the game is very buggy and the music is a bit annoying. On the technical side: make shure the game checks if an object exsists before you check any of its varables.  

f.eks.

if(instance_exists(obj_warp)) {execute code related to the obj }

else 

{

maybe spawn the object that is missing or something. 

}

also made a gms game if youre intrested. It has some bugs as well; https://itch.io/jam/gmtk-2018/rate/301335

I got this when I tried clicking on what I think was the warp...

___________________________________________
############################################################################################
FATAL ERROR in
action number 1
of  Step Event0
for object obj_warp_pointer:

Unable to find any instance for object index '7' name 'obj_warp'
at gml_Object_obj_warp_pointer_Step_0
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Object_obj_warp_pointer_Step_0 (line -1)