SUM//12 is a small, fast number game built around one simple rule: make exactly 12 without going over.
Place each incoming number into one of three columns. Hit 12 exactly to clear a column. Go over 12 and that column is lost.
Each round lasts 2 minutes and 30 seconds, so every decision is a balance between speed, calculation and risk.
Features:
2:30 score-attack rounds
Three-column number strategy
Current number plus the next two for planning
Local high score
Offline play
No ads
No accounts
No subscriptions
No tracking
Open. Play. Nothing else.
Built with substantial assistance from AI tools, with human direction, design decisions, testing and final responsibility. SUM//12 does not use AI during gameplay and does not send gameplay data to AI systems.
