Journey to eternity by outer123 https://opengameart.org/content/journey-to-eternity CC0

Chill Jungle Ambient by Tausdei https://opengameart.org/content/chill-jungle-ambient CC-BY 3.0

Resultant license: CC-BY 3.0

You can play a game featuring this track called "Froggy guard" here: https://happyfacemike.itch.io/froggyguard

Update: Added a second version of this mix which features a new track by outer123:

Crystal caves
Author: outer123 
https://opengameart.org/content/crystal-caves-0
License(s): CC0

License remains the same for both mixes.

I added a third mix which contains the following tracks:

Journey to eternity
Author: outer123
https://opengameart.org/content/journey-to-eternity
License: CC0

Crystal caves
Author: outer123 
https://opengameart.org/content/crystal-caves-0
License(s): CC0

Flags
Author: TricksNTraps
https://opengameart.org/content/free-music-pack
License(s): CC0

To avoid confusion, this submition will remain with resultant license as CC-BY 3.0 (which applies to mixes 1 & 2) but the third mix contains only track with license CC0 so the third mix can be safely licensed as such.

To better clarify: Mix 1 & 2: CC-BY 3.0

Mix 3: CC0 (no attribution needed)

Enjoy!

New flamenco versions:

The new flamenco versions are The same mixes 1 & 3 with the add of the following tracks:

Flamenco samples by Santiago Sánchez Cifuentes
Flamenco samples used in this mix:
. Ritmo_de_rumba_flamenca_(220_bpm) → Flamenco rumba rhythm (220 BPM)
. Ritmo_de_rumba_catalana_(250_bpm) → Catalan rumba rhythm (250 BPM)

https://learncajonflamenco.com/santiago-sanchez-ifuentes/
https://commons.wikimedia.org/wiki/Category:Flamenco_samples_by_Santiago...
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.

Since the flamenco samples are licensed as CC0 1.0, the resultant license does not change, so the same licenses applied to the flamenco and non flamenco versions of the mix (I hope it's not confusing, otherwise feel free to ask)