Hey again, the smoke is supposed to appear in the cupacabra's background when the alien is dead but it's not supposed to turn green lol so I'll have to look into that, thanks for letting me know!
As for the bug with the wisp, I just fixed it and reuploaded the game to itch so that shouldn't be an issue anymore.
As for the calls talking to the shadow man will point you to the correct phone number to go off of. The correct hint is:
The space man's coffers are bone dry. Visit the siren then give him a try.