Swing your pick to smash matching clusters and keep the tunnel from closing in while you chase big combo scores.
Scan the wall for groups of two or more matching blocks, then tap or click to throw your pickaxe and clear them. Go for larger clusters to push the wall back and buy time. Remove lone blocks early so they do not trap you. Plan one or two moves ahead to set up chain reactions and keep space open.
Tip Carve a horizontal channel to maintain breathing room and set up easy clears as the wall advances.