first-person 3D block sandbox
WASD move · SPACE jump · 2×SPACE fly (SPACE up / SHIFT down)
Q toggles BUILD ⇄ BLAST — build: HOLD LMB + DRAG to paint blocks · E / RMB + DRAG to erase
blast: LMB fires the shotgun — pellets smash blocks · 1–5 block color · ESC release mouse