The intended toy drops code rectangles thirty pixels wide and sixty high, while sleep rectangles are one hundred twenty wide and thirty high. Code area is one thousand eight hundred square pixels; sleep area three thousand six hundred, twice as much. At one diagram pixel per source pixel the green rectangle keeps its thirty by sixty geometry and the blue rectangle one hundred twenty by thirty. Their exact dimensions, not category names, define the shapes. Assigned density is point zero zero one for code and point zero zero five for sleep. Multiplying area by density gives mass coefficients one point eight and eighteen, so sleep has ten times the assigned mass, not five times: its density ratio and area ratio both contribute. No biological sleep benefit or real coding productivity is measured. The score accepts a block only when both horizontal and vertical velocity magnitudes are less than point one. It measures viewport ground height minus the block center coordinate, floors that distance and preserves the maximum until reset. In a hypothetical seven hundred twenty pixel viewport, a settled center at six hundred sixty gives sixty points; moving that center to six hundred twenty gives one hundred. At two pixels per point sixty measures one hundred twenty, one hundred two hundred and difference forty eighty. It uses center height rather than the top edge of the block, and does not check angular velocity or prove the tower will remain stable. A high score can remain after blocks fall because only a larger maximum overwrites it. Drop height is clamped between one hundred pixels and thirty percent of viewport height. At seven hundred twenty tall, the upper clamp is two hundred sixteen. At three hundred tall thirty percent is ninety, below the minimum, so the outer maximum still returns one hundred. At one diagram pixel per coordinate tall upper clamp two hundred sixteen measures two hundred sixteen, minimum one hundred one hundred and difference one hundred sixteen one hundred sixteen. In the saved local page the Matter library is unavailable and its explicit guard returns before controls, score loop or PNG export are registered. The canvas area shows the original failure message, not a running simulation. Preserve the original viewport allocation and this guard. No actual dropped blocks, physics playback, exported PNG, real code execution or model inference is verified.