Insanity

I wonder if the level would have the same difficulty if less of the unused space was available. To me it seemed fairly obvious that at least one quarter of the board would be unused.

Bad Touch

Dotted

One of those 'invest steps early, save more later' type of tricks. Nice design!

Quicksand

Sometimes you've just got to push through the weak spot instead of making a weak spot in a wall.

Wrinkle

Scatter

Crossroads

Spinner

Rack

Nudge

This feels like one of those techniques that are fairly understandable in isolation, but will completely destroy me when used in larger levels later on..