Alien Grains

Something landed on Earth. Nobody knows what it is. It breeds. It does not stop. It ignores every material we have ever made. You cannot push it, hold it, or break it. Only three things reach it — food, walls, and light. You are a containment controller. Your job is not to destroy them. Your job is to keep them apart from us. ■ One wall, drawn with your finger Drag across the screen and a wall appears. That is the whole control scheme. You never pick up a creature. You read the flow, shape a path, and close it. Thousands of individuals move on their own. Nothing is pre-animated. The same level never plays out the same way twice. ■ Two missions · CONTAIN — herd everything into a region under a given area and seal it. The tighter you close, the harder it gets — and the more certain the result. · DRAIN — funnel them into recovery sites. What goes in does not come back. With several sites, quotas must match too. The two demand opposite skills. One closes. One opens. ■ 10 fronts, 100 levels Every front has its own terrain, and terrain cannot be erased. Later fronts add numbers, speed, and hazard zones. The final front flows 19,800 individuals at 60 frames per second. There is no timer. The only pressure is your own record. ■ How it is built A GPU simulation written directly in Apple Metal. Every individual is actually simulated, leaves a trail behind it, and that trail pulls the others. No video, no canned animation. Portrait, one hand. No account, no login, no server. Your progress never leaves the device.