Glad you had fun and enjoyed it!
At the moment no it doesn't do anything, but as of Version 0.06 You can masturbate as a skill and the arousal meter will play a role in how much cum you will shoot. In the original game Furgeon, being too aroused resulted in an automatic lose scene where you get fudged by an enemy. Which is something ill hopefully be implementing soon in the later updates. So no atm, it doesn't do anything but will play several roles in mechanics later on.
The sprinting bug has also been patched in the next update as well and in general, had a slight overhaul to fix various issues! Such as the no-losing stamina issue you explained and of course, the running through walls issue, so already fixed!
As for the Hellion Gem in Sleep World, the bug was already found and patched in the current patron version 0.06. Thanks anyway though, :D!
The use of a Hellion Gem in Hellious is a new one though, but should be a simple bug to fix, thanks for letting me know!
As for the sound not changing in the title screen, yea gonna be honest and not entirely sure why it doesn't change with the title screen, def need to search for that one in the code more closely.
anywho, thanks for all the feedback and I hope you continue to enjoy this project's development, :D