Model Engine Builder vs Northdown

Build a miniature engine one part at a time in a retro pixel workshop. Choose from eight designs: diesel, OHV, DOHC, two-stroke, parallel twin, inline four, V-twin and boxer four. Fit parts in order, tighten bolts to the right torque, adjust each engine’s setup and time its ignition. The same engine model appears in selection and assembly. Follow moving pistons, connecting rods and the compact DOHC timing chain as you build. Every stage contributes to a score out of 1,000. Keep a personal best and recent build history for each engine on your device. Three engines are available from the start. Unlock the others by completing optional rewarded ads. The non-consumable Remove Ads purchase removes advertising and unlocks all engines; purchases can be restored. Play in English, Korean, Japanese, French, Spanish, German, Traditional Chinese, Thai, Italian or Hindi. Change language in the globe menu. Advertising privacy choices are available where required. A stylized assembly and timing game, not a repair manual or engineering simulator. Compete on a separate Game Center leaderboard for each of the eight engines. Online rankings require Game Center sign-in.

Northdown is a 3D gravity puzzle. Your character cannot climb — so you tip the whole world instead. Swipe, the world rotates, the blocks tumble, and a wall becomes a floor. 100 hand-built levels. Free, offline, no wifi needed. A GRAVITY PUZZLE GAME WHERE THE WORLD MOVES, NOT YOU Gravity is the move. Rotate the world 90° and every block falls somewhere new — including you. Each level is a small floating world with exactly one way out, and finding it feels like a trick you taught yourself. If you have played a gravity puzzle before, you have not played one that turns the whole map. 100 LEVELS ACROSS 21 PAINTED PLACES Balloon skies, waterfall islands, a red canyon, temples in the clouds, the aurora, deep space, and lava spires at the very end. The sky changes every fifth level, and the light on the blocks follows it. A 3D GRAVITY MAZE IN YOUR POCKET Every stage is a small 3D maze built out of gravity blocks. Walk, tip, watch it fall, walk again. Simple to pick up, and the later levels are a genuine brain teaser. STARS, NOT TIMERS Every level has a shortest route. Match it for three stars. Nothing counts down, nothing runs out, nothing blocks you from playing. A relaxing puzzle game you can put down and pick straight back up. A NEW PUZZLE EVERY DAY The daily puzzle is the same one for everybody in the world. Build a streak — one free streak freeze a week forgives a missed day. SIX CHARACTERS TO EARN Sprocket the field medic, Rajan, Kofi, Zahra, Wisp and Bolt. Each has their own walk, their own voice and their own way of celebrating. Unlocked by playing, never by paying. PLAYS OFFLINE, ANYWHERE No account, no sign-in, no internet. An offline puzzle game for flights, commutes and dead zones. BUILT FOR ONE HAND Two on-screen pads: left walks, right tips the world. Portrait only, one thumb, any time. ACCESSIBLE Reduce-motion and colour-blind modes are built in. Coins are earned by playing and spent on hints, an extra undo, or a skip when you are truly stuck. Optional ads pay coins, and a one-time purchase removes the ads between levels forever. If you like gravity puzzles, isometric puzzle games, 3D logic games and brain teasers, Northdown was built for you.