Skull Tweak in Bloons TD 6 becomes more demanding on Standard (Medium), with faster bloons and tougher rounds requiring a more efficient defense than on Easy difficulty. The map’s distinctive skull-shaped layout, water areas, bridges, and line-of-sight blockers make tower placement an important part of your strategy. By using the available space efficiently and investing in well-timed upgrades, you can maintain strong track coverage and successfully clear every round.