Jester Spark - a falling-block puzzle set in a jester's theater, where gem pieces made of four linked jewels drop one at a time into a tall well of ten columns and sixteen rows. The next piece is shown in a side panel, so the upcoming move can be planned while the current piece is still falling. Side swipes or the LEFT and RIGHT buttons shift the falling piece by one column, a tap on the well, an upward swipe or the TURN button rotates it, and a downward swipe or the DOWN button speeds up its descent until it lands. A translucent outline at the bottom of the well marks the spot where the piece is going to settle. Every row that gets completely filled with gems vanishes, the rows above drop down, and points are added: one row gives 100 points, two rows give 300, three rows give 500 and four rows at once give 800, all scaled by the current level, while a sped-up descent adds one point per cell. Every ten cleared rows raise the level, and each new level makes pieces fall faster. The round ends when a new piece has no room at the top of the well, after which a final panel shows the score together with RESTART and MENU buttons. A pause button freezes the round at any moment and offers RESUME, RESTART and MENU. Eight achievements, from the first finished round to a four-row clear, a score of 5000 and ten rounds played, unlock during play and stay unlocked across launches, while locked ones appear faded. The settings hold the best score with its own reset, three fall speeds (EASY, NORMAL and HARD) for new rounds, a board shake on cleared rows, the landing outline and a full progress reset, and every choice is kept after the app is closed. A built-in guide explains the controls and scoring in a few short lines.