red tree
A downloadable confounding game

The goal is to figure out the rules and reveal all of the hidden words in this image.
main rules
Each arrow represent a transformation of one word into another one.
The color of the arrow is the specific rule behind that transformation. (for example, a color could mean "change all E's to I's", which leads to THEN -> THIN)
The intermediate word between two arrows must be a valid english word.
Hint : bar neebj punatrf n jbeq yvgrenyyl, bar punatrf n jbeq cubargvpnyyl, naq bar punatrf n jbeq svthengviryl
Special thanks to the Icely Server and specifically Fox Chaotica for helping me a bit with this game

Comments
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So: I haven't given up on this, but also I'll admit I'm more than a little stymied. (Obviously, since it's mid-January and I'm still working on it.) Can you confirm that the white arrow means (following in rot13 for spoilers)
though if that's right, I don't know what's below "hear" (I'm assuming that "two parallel arrows" means "you can use this transformation in two different ways to get from A to B". Like, "read -> lead" could be connected with two arrows that mean "rhyme", because they rhyme as present-tense/opposite-of-follow and also as past-tense/metal-element.)
The problem I'm hitting is that there's no independent evidence for orange and blue, only for them together. I want, based on the above, for
Want to offer a nudge in the right direction?
After a lot of thinking I added an hint to help you out