Read priority first
The manifest must be completed from P1 upward. If the front cargo is not next, hold it instead of routing it.
A mobile-first queue programming game with 120 verified levels, daily missions, sound effects, anonymous URL challenges, and a strategy guide.
Manage a FIFO queue with hold, priority, and destination-routing commands across 120 algorithm-verified cargo missions.
Level 36
Up to 9
Find the next priority cargo. Hold the front item or route it to the correct dock.
YouToStem · Strategy
The manifest must be completed from P1 upward. If the front cargo is not next, hold it instead of routing it.
Once the priority is correct, match its Luna, Mars, Jupiter, or Terra marker to the corresponding dock.
Hold moves the front cargo to the back. On harder levels, simulate one queue rotation before adding commands.
Use Repeat Previous only for consecutive identical actions. It shortens a program, but also repeats mistakes.
Process the queue in manifest priority order. Hold the front item if it is not next; otherwise route it to the dock matching its destination, then run the program.
It practices FIFO queues, state changes, command sequences, priority scheduling, and conditional routing. Players predict how every command changes the queue.
Four stages grow from four to seven cargo items and from two to four destinations, with increasingly shuffled queues and longer dispatch sequences.
It executes the preceding non-repeat command again, which helps with consecutive holds or routes. It cannot be the first command because there is nothing to repeat.
Yes. A date-based seed gives everyone the same puzzle that day and changes the puzzle the next day. The same solver verifies every daily mission.
No. After a win, Invite Challenge stores the seed, command count, and time in the URL so a friend can play the identical queue.
Mobile browsers usually require a first tap before audio can play. Adding any command activates sound, and the speaker button can mute or enable it.