Clear every letter.

Draw a shape.

Trace words of three letters or more. Diagonals count.

Stuck? Draw more letters. Each stroke is −1.

Live wire. Every word must use the live vowel. Tap it to move the charge.

Each word heats the charge. From the third in a row it burns grey letters.

Let it run out of time and it scatters new ones.

Overgrowth. Moss grows new letters onto your shape. Use them in words.

Cut moss off from your letters and it withers.

The green number is the room it has left. At zero the moss takes over.