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How to play

The cubes up top are coming for you. Down below are turrets, each a colour with a number of shots. Click the front turret of a column and it goes into the first free slot, then fires at the cubes along the bottom of the board — but only at its own colour. Shoot a cube and its whole column drops down, and the next cube is the one in front.

Which cube gets hit first? Only the cube at the bottom of each column can be hit, so that is what a turret aims at. Of the bottom cubes that match its colour, it takes the one nearest to its own slot — straight above it if there is one, otherwise the closest sideways, and the left one if two are equally close. When several turrets are loaded they take turns, one shot each, from the left-hand slot to the right. So a turret on the left clears the left of the board first, and the slot you load into matters.

A turret keeps firing until it is out of shots, then it goes and frees its slot. A turret with nothing of its colour to shoot just waits, and keeps its slot. Fill every slot with waiting turrets and you are stuck.

So choose carefully. The board is taller than the screen, and a turret marked ? is a mystery until it reaches the front. Every level can be cleared — there is always a way — but plenty of ways to be wrong.

Stars

One
Clear the board
Two
Clear it never having many turrets loaded at once
Three
As few as it can possibly be done in, and no undo

Keys

1 to 5
Load the front turret of that column
U
Undo
Escape
Menu

Settings

Music Off unless you turn it on. Play ours or your own songs, and swap any of the game's sounds for one of your own.
Cube look How the cubes are painted. Only the look changes.
Shots What a turret fires.