I finally verified the tune to be Happy Feelings (Riu Palace Summer '96 Version)
It can be found on the following release [JMG Productions] https://www.discogs.com/Various-Riu-...release/867183
The version on this disc is ~1 minute shorter, but it's the official release, as sample can be heard on this site: Sequential One — Happy feelings
Here is what it says on the site:
"Where to look for alternative versions
The summer version of 96 is one of the rarest reworkings of Sequential One. You can find a mix only on a mini-collection with the long title "Riu Palace - Volume II - The 1996 Tower of power DJ-team". He was never sold officially, but only distributed in Spain at the same event on the island of Mallorca."