They now have the colors of English letters. This is mostly based on transliteration, but a few are based on shapes or roles. Alpha: A Beta: B Gamma: G Delta: D Epsilon: E Zeta: Z Eta: H (because Eta and H have the same shapes) Theta: Þ (from @tvokids_e-again) Iota: I Kappa: K Lambda: L Mu: M Nu: N Xi: X Omnicron: O Pi: P Rho: R Sigma: S Tau: T Upsilon: U Phi: F (nothing changed) Chi: C (because Chi has C's face) Psi: W (because Psi has W's role; also nothing changed) Omega: Y (I remember seeing a comment about how Omega would enter the cave/lair like Y did in the original)
Credits to @PhonicLover44, @wario100, and @tvokids_e-again for the sprites.