Star Archer's Star Puzzle would not exist without help. Many thanks to all the following people.
Puzzle Inventor
Unknown
Software
Eddie Caplan
Emotional & Math Support
Barbara Hays
Support and Testing for Star Archer's 2004 version in Flash
Barbara Hays
Sarah Caplan
Noah Caplan
Eric Caplan
Nathan Burnside
Tech Help for Current 2020 version
None of this would be possible without the Unity development platform. Hooray for all of their dedicated effort and support.
Math:
Nikhil Sreekumar, Ross Rheingans-Yoo and Kirill Kuzyk for determining colinear by area
Bit Barrel Media's excellent 3d Math Functions
Dave Newson's informative article about floating point accuracy in Unity
John Page's Math Open Reference which helped me center a 5-pointed star inside a 360 degree circle
Pratik Chhajer: Find Angles Given Vertices
Anonymous: Triangle Math by Area, with Heron's formula
patrickJMT: Triangle Math by Area : Heron's formula to find height of Triangle
Brilliant.org's Wiki: Algorithm 1: Centroid
Brilliant.org's Wiki: Algorithm 2: InCenter
Brilliant.org's Wiki: Algorithm 3: Orthocenter
Brilliant.org's Wiki: Algorithm 4: Circumcenter
Kristina Dunbar's extremely clear comparison of the 4 algorithms
Unity
Alexander Zotov: Consistently among the best Unity videos.
Bunny83: thank you, thank you, for the beginners help I needed.
Philipp (from Vienna): Enormous help re: clipping while zooming
Sayuri Iida: Clear, Clever, Fun explanation of Unity's Live Links & Hover. Special shout-out to the many engineers at Mozilla and Google who implemented auto-translation in Firefox!
w3schools to the rescue, as always!
Anonymous documenters at Unity: EscapeURL
Jon L: saved me after lots of confusion. Thank you Jon!
HUGE thanks to Waldo: Pinch to Zoom and Panning on Mobile in Unity
Lance Talbert: Saving Settings
Lance Talbert AGAIN: Saving Settings with a Menu
Solving problems with Random Number. Thanks to TheCatProblem and DiegoSLTS
Solving problems Unity's splash screens #1: Code Monkey: Scene Manager in Unity (Unity Tutorial)
Kee Gamedev: Confetti/fireworks celebration & snow animations!
yasirkula: Perplexing problem with permissions
Omnirift: Very clear explanation of Unity's Mesh
Omnirift: Lots of other helpful videos
LiefLayer: Simplified (and working!) POST to PHP
nmill99: Straight-forward, clear, answer to perplexing TextMeshPro problem
Ather Omar: excellent tutorial that made Star Puzzle's tutorial possible
kendra corpier: Perfect instructions for publishing Unity games to Google Play Store
Sunius: Saved hours & days of trauma when a working build suddenly stopped building!
andymads: Direct, correct, guidance for building Unity app on iOS
Scott Orgera: Direct, correct, guidance for installing Unity app on iOS
Intricacies of Publishing Apps
Kendra Corpier: Wonderful step-by-step instructions for publishing Unity apps to Google Play Store
ArianJM: Asking and answering his own question re: versions vs bundles
Olivia, TobiasReichert: why is a test app available but not available?
Deepak Pawar: how to test and how to END TESTING of a Google App
Miscellaneous
Timothy Huang for a clear regex test to determine mobile browsers
Cyrille_O: String interactions between Javascript & Unity
Firebase: Excellent & Free generation of Privacy Policy & Terms Of Service
Hotpot.ai: Absolutely wonderful, absolutely free icon generator for every platform
Amit Argawal: Worked perfectly the first time: managing screenshots in Google Forms
bafromca & prdeepkumawat: Why screenshots in Google Forms prevents anonymous submissions
m00sey: Clear summary of UI best practice