• Type x → crosshair moves left or right
• Tab to y → crosshair moves up or down
• Enter or Fire! to shoot
• Get 7 hits to advance each level
• L1 no timer  ·  L2 10s  ·  L3 7s  ·  then the Boss

• Type x, Tab to y, press Enter to fire
• New monster spawns the moment you zap one
• No per-monster timer — just nonstop action
• Your best score is saved on this device

Step 1 — Zap monsters fast

Monsters appear on the grid one at a time. Each has a countdown ring — type its coordinates and fire before the ring runs out!

Step 2 — Don't let them lock

If a monster's timer runs out, it locks — it turns gray and you can no longer shoot it. Locked monsters stay on the grid.

Step 3 — Watch your quadrants

The grid has four sections called quadrants. If 3 monsters lock in the same quadrant, they merge into one giant monster!

Step 4 — Stop the merger

The giant monster travels in a straight line toward the y-axis. Its equation y = mx + b is shown on screen — use it to predict where it is headed!

When it reaches the y-axis it pauses at its y-intercept. That's your secret weapon — shoot x = 0, y = b to destroy it!

Step 5 — Protect the city

If you miss the y-intercept, the monster travels down to the city. Three hits and the city is destroyed — game over!