Hello. I'll tell you how to make a very simple mini card for your game.
First, download the sprites.(Sprite icons player will be the same)
Point at the minimap set:
And do a little white box that will mean our ship.
Ship on layer "scena", minimap on the layer "int"
In the layer "int" set parallax value to 0.
Go to the tab events.
Do the first event.
Event: system-> every tick.
minimap-> set width; volue= LayoutWidth/20
minimap-> set height; volue= LayoutHeight/20
Divide by 20 means that the sprite will minimap 20 times smaller than our level (you can put its value).
Next to this event to add actions:
value x= minimap.X+ship.X/20
value y= minimap.y+ship.y/20
Divide by 20 for the same reason.