Sand Blocks Level 420 Walkthrough
10/21/2026
Overview
Level 420 = mid-hard checkpoint. Full video solution.
Step-by-step walkthrough
Level 420 is the mid-hard checkpoint for the 416-430 zone. Use this level to: (1) verify cascade chains are working, (2) save 3+ boosters for 425-440 harder zone, (3) practice long-block timing. Do NOT use all boosters here — save at least 3 for the next 20 levels. Level 420 is winnable in 25 drops with cascade discipline.
💡 Pro tip
Save 3+ boosters for 425-440. Cascade discipline wins.