missile trail sprite animation to your liking, e.g missile_trail_fx="MISSILE_TRAIL_DICT2", you can passed a different sprite animation (check the file `textures.py` for more details on how to create a sprite animation) Sound effect can also be changed with the variable `propulsion_sound_...
Receptors may be external—exteroceptors—or internal—interoceptors. Exteroceptors are located on the external surface of the body of an animal or man, where they receive such stimuli from the external world as light, sound, and heat. Interoceptors are found in such tissues and internal ...