Gravity Courier vs Trace

You are a space delivery controller. Your only job: choose when, which way, and how hard to launch — then let gravity do the rest. Gravity Courier is a minimalist orbital puzzle built on real physics. The Sun, planets, and moons are genuinely orbiting in real time. There is no joystick, no thrust-and-steer. You read the dance of the planets, pull back a slingshot to aim, pick the launch moment, and fire. From there, gravity alone bends your probe's path — so a straight shot will never work. Predict the curve, use a planet's pull, and arrive exactly on target. WHY IT FEELS DIFFERENT • Real orbital mechanics — Keplerian planet motion + true n-body gravity on your probe. Deterministic, fair, and endlessly satisfying to "solve." • One decision, infinite depth — only date, direction, and thrust. Easy to grasp, hard to master. • A living solar system — Mercury to Neptune orbit at their own speeds. Change the launch date and the whole board lines up differently. MISSIONS ACROSS THE SOLAR SYSTEM • Orbit — loop a planet or moon without escaping or crashing • Flyby & return — swing around the Moon's far side and let gravity sling you home • Landing — enter a gravity well and settle into a soft touchdown • Reach — time an interplanetary transfer to meet a moving planet where it will be • Gravity assist — skim a giant planet and steal a free push • Orbital cleanup — ram drifting space debris before it spreads FEATURES • 90+ handcrafted missions across the Sun, Moon, Venus, Mars, Jupiter, Saturn, and the outer planets • Predicted-path preview with a closest-approach marker — line up the gap and you'll hit • Reserve a mid-flight boost on your trajectory, or fire it by hand • Star ratings reward fuel economy and fast transfers — chase that 3-star run • Replay any flight and share it as a trajectory image card • Clean, quiet, starfield aesthetic with a calming soundtrack • 13 languages • Play offline • One-time "Remove Ads" available No timers pushing you. No pay-to-win. Just you, the planets, and one perfect launch. Read the orbits. Launch right. Safe orbits, courier.

Trace is a minimalist brain puzzle game about memory and steady hands. Each level briefly reveals a maze — walls or a glowing path — and then it's gone. Now retrace the route from start to finish in one continuous gesture. From memory. No timer on the solve phase. You don't have to be fast. You have to remember, and trust what you remember. BRAIN TRAINING Trace works as a daily exercise for short-term memory, spatial reasoning, and focused attention. A few seconds to absorb the maze, then it's just you and the trace you draw from memory. Short sessions, real cognitive load — five to ten minutes a day adds up. CORE MECHANIC • Memorize the maze in 3–8 seconds • Draw the solution in one unbroken motion • Fail, retry — but tougher levels don't fully reset CHECKPOINT FLAGS Before each attempt you can plant a flag mid-path. If your stroke reaches the flag but fails later, that section banks — next try starts already-completed up to the flag. The game rewards careful play, not frantic retries. FOUR CHAPTERS • Spark — tutorial, simple paths • Echo — 3×3 and 4×4 walls • Dusk — start and finish hidden during memorization • Abyss — 5×5+ grids, sometimes rotated between memorize and draw WHAT IT TRAINS • Short-term memory — hold the path in mind after a brief reveal • Spatial reasoning — a route, not a picture • Concentration — one steady gesture demands certainty • Attention to detail — every cell matters LOOK Clean geometry, calm palette, nothing extra on screen. Dark and light themes — switch manually or follow system. WHO IT'S FOR For people who like puzzles calibrated to demand attention, not reflexes. Calm focus, not speed. Made for the 5–15 minutes between things — and effective as a regular memory workout. svyatoslavdp@gmail.com