🐸 COBOL CASCADE
⏱️ 1-5 min
🎯 Typing
🏆 High scores
COBOL keywords are falling from the mainframe! Type them to catch them —
PERFORM, MOVE,
COMPUTE and more. Build combos, level up,
and whatever you do, don't let GO TO hit the ground
— Froggy is watching.
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⏱️ FROGGY'S BATCH JOB
⏱️ 1-2 min
🎯 Rhythm / DDR
🏆 High scores
Four batch queues — READ,
PROCESS,
WRITE &
COMMIT — need deploying in rhythm!
Hit the notes as they reach the zone with D F J K keys or tap the lanes.
★ Perfect earns Froggy's praise —
miss and the mainframe ABENDs.
12 rounds, increasing speed!
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🌙 PERFORM UNTIL MIDNIGHT
⏱️ 1-2 min
🎯 Judgment / Reflex
🏆 High scores
You're the night-shift COBOL operator at Rib IT Ltd.
COBOL statements flash on screen — COMPILE the valid ones
and ABEND the bugs! 3 lives, combo scoring,
and a midnight clock that never stops. How long can you last?
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🐸 THE GREAT COBOL ESCAPE
⏱️ 2-5 min
🎯 Maze / Puzzle
🏆 High scores
You're a COBOL program trapped in the mainframe dungeon! Navigate generated mazes,
collect all 💾 DATA tokens to unlock the exit, and
avoid GO TO bugs (🐛) that cost a life. 10 levels of
increasing size and difficulty. Arrow keys or swipe to move.
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⏱️ MIDNIGHT COMPILE
NEW!
⏱️ 1-2 min
🎯 Timing / Aim
🏆 High scores
Night shift at Rib IT Ltd. The compile slot sweeps
across the mainframe track — press SPACE precisely
to lock in your deploy! The target zone shrinks each round,
the needle speeds up, and one wrong move = COMPILE ABEND.
5 lives. Infinite rounds. Maximum precision.
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🧬 CA LAB
NEW!
⏱️ Unlimited
🎯 Cellular Automata
🧪 5 rule sets
An interactive cellular automata playground with 5 rule sets.
Conway's Life, Brian's Brain,
Seeds, HighLife &
Day & Night. Click to toggle cells,
drag to paint, Space to pause,
R to randomize. Watch emergent patterns evolve in real-time.
🧬 EXPLORE