Lucky Win Spins triggers ten free spins when three or more coins land. Its bonus contains fifteen concealed coin positions, with values revealed as the feature progresses, including Mini and Mega jackpot possibilities. That structure should be read as a free-spin sequence rather than automatically described as a three-respin Hold And Win game. The sound and music intensify when additional coins appear, but those presentation cues are not evidence that the next spin will reveal a particular prize.
To compare related slots formats, read the rules of Cash'n Fruits 256 Hold And Win and Mega Lucky 243.
The library also explains the difference between lines, ways and clusters to help put these mechanics in context.
Source: published game information.