Noctave
The piece
The tune appears in France around 1760. Mozart wrote twelve piano variations on it, K. 265, and English speakers sing it as "Twinkle, Twinkle, Little Star", a poem by Jane Taylor published in 1806. Noctave's arrangement gives the whole tune to the right hand and supports it with half-note basses in the left.
Nearly every note is played twice in a row, so the challenge is repeating without pounding: let the key rise just far enough to sound again. Right at the start, the right hand jumps from C up to G, a fifth; keep your thumb on C and your fifth finger ready over G. The A that follows lies outside that five-note position, so stretch a little and come back. The two middle phrases start on G and step down to D in pairs; count the pairs so none goes missing. In the left hand, C, F and G take turns slowly enough, at 100 beats per minute, for you to learn them on the bass staff.