Hello Tallman, Thank you for your feedback.
Yes, I´m having trouble with the Auto-builds. Something in the code crews up when It reaches 0, sometimes going to -1 sometimes working normally. I´m still fixing it.
Soul Sphere will have about 20 upgrades, each one giving it more power.
The Lost Souls will have more options and researches in the next version.
Thank you for playing! I´ll try to upload a more recent version ASAP!