https://en.wikipedia.org/wiki/Tidal_acceleration
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The average tidal bulge is synchronized with the Moon's orbit, and Earth rotates under this tidal bulge in just over a day. However, Earth's rotation drags the position of the tidal bulge ahead of the position directly under the Moon. As a consequence, there exists a substantial amount of mass in the bulge that is offset from the line through the centers of Earth and the Moon. Because of this offset, a portion of the gravitational pull between Earth's tidal bulges and the Moon is not perpendicular to the Earth–Moon line, i.e. there exists a torque between Earth and the Moon. This boosts the Moon in its orbit, and slows the rotation of Earth.
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Tides boost the Moon upward and slow the Earf's rotation.
oil pan 4 -- For low-head situations you'd want ocillating water colums:
https://www.google.com/search?q=oscillating+water+column
They use a 0-pitch low efficiency rotor that works whether the water is rising or falling. OTOH using Moon power to grub in the ground for smelly tar seems negatively efficient. Maybe better to use it to make electrochromic glass for retro-fitting sky scrapers.