Stack blocks. Manage the tilt. Tip past 45° and it's over.
♾
Classic
Endless — score as high as you can
⚡
Sprint
Race to 40 lines as fast as possible
🏃
Quick Play
Short, fast — 20 lines to win
⚖
Survival
Endure the tilt — survive as long as possible
🎯
Challenge
Hand-crafted physics puzzles — earn stars
🌀
Chaos
A new piece every 7s — you only control the lowest
📈
Ascent
Staged climb — speed, tilt & density ramp every level. Reach stage 25 to win.
Endless — score as high as you can
Display settings
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Classic
Capsized!
Display settings
Game Paused
50%
Controls
←→ / AD
Move
↑ / W
Rotate
↓ / S
Soft Drop
Space
Hard Drop
C
Hold Block
Z
Zone (freeze tilt)
H
Hint Pro
P / Esc
Pause
Physics Configuration
Standard (0%)
Less ← More aggressive tilt →
Standard (0%)
Slower ← Faster score multiplier →
Press P or ESC to resume
PROGRESSION
Newcomer
ZONECharge by clearing lines
0%
PRESS Z
ZONE ACTIVE
0 lines
COOLDOWN
Level 1
Lines: 0 / 10
Speed:0%
Physics:0%
Density:0%
Speed Phase
Hold
Balance Monitor
Angle:0.0°
Velocity:0.0
Stability:100%
Effects:None
Balanced - Good job!
MENU
DAILY CHALLENGES0 / 3
PROFILE
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MY SCORES Classic · Top 20
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LAYOUT
Show sections:
SETTINGS
50%
DENSITY GUIDE
Each block is outlined in its density color. Heavier blocks tilt the board more.
🎯 Challenge Mode
0 / 12 completed
Challenge
Objective
0%
Press V or Esc to exit
Keel: Heavy Seas
The unforgiving board — the ship lists faster and harder, so one sloppy container can roll you straight over.
How to play
The high-difficulty cargo-balance challenge. The rules are the same — drop containers, clear lines, keep the hold level — but the ship reacts far more sharply to imbalance. The list builds quickly and the recovery window is short, so precision matters on every single piece.
Load and rotate falling cargo to clear rows
Manage a ship that heels faster and steeper than usual
Correct any lean immediately before it runs away
Survive the heavier physics as long as you can
Controls
Desktop: Left/Right arrows move, Up rotates, Down soft-drops, Space hard-drops
Phone & tablet: swipe to move, tap to rotate, swipe down to drop
Tips & strategy
Stay near level at all times — there's little room to recover here
Pre-plan each drop so you're never forced into a heavy side
Prioritise clears that lower weight evenly across the hold
About Keel: Heavy Seas
Keel: Heavy Seas is the original hard-mode entry in the Keel series, fusing falling-block puzzling with a punishing balance mechanic — a free browser game for veterans.
