Gameplay

Rotations

Capsules rotate within a 2x2 box around the bottom left axis, with the exception of a wall kick. Pressing the <A> button rotates the capsule clockwise, while pressing the <B> button rotates the capsule counterclockwise.

Note: I find these animations easiest to follow when looking at one side of the capsule.

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  Clockwise rotation around the bottom left axis using the <A> button

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  Counterclockwise rotation around the bottom left axis using the <B> button

Wall Kick

If the capsule is blocked from rotating on the right side (when rotating from a vertical to horizontal orientation) and also has room to move to the left, it will be kicked one position to the left. This happens regardless of what is blocking the rotation, whether it be a virus, capsule piece, or the wall of the bottle.

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  Capsule being kicked left after a clockwise rotation while against the wall of the bottle

Left/rotate anomaly

When pressing the <L> direction and rotating the capsule with either the <A> or <B> buttons from a vertical to horizontal orientation on the same frame, instead of moving 1 position to the left, it will move 2.

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It has been theorized that this was added to the game to allow a player to place a capsule in a horizontal orientation underneath 2 other columns to the left. Because capsules rotate around the bottom left axis, this is possible with only 1 move to the right, but requires 2 to the left.