Build height
Ground level
Select a circuit to preview it, or build directly on this layer. Page Up / Down changes height.
Parts
PressTto zoom out to the overhead view ·Llibrary ·Escmenu
tick 0 · pending 0 · blocks in your build 0
Controls & shortcuts
Lcircuit library, working previews, electronics lessons, and gate combinations.
WASDwalk. Double-tap W or hold Ctrl to sprint. Shift sneaks.
Spacejump. Double-tap space to fly like creative; space and shift go up and down.
Mouseright click places what you hold or uses what you point at (shift to build against it). Left click breaks. Middle click picks the block you point at. Wheel and 1 to 9 pick from the bar.
Einventory. Right click a chest, hopper, barrel, dropper or dispenser to open it. E, its X or a click outside closes it.
Tlifts you up into the overhead view; T brings you back down. Page up and down change layer there, wheel zooms, shift-drag pans.
Rcycles a fixed facing for what you place (). Auto follows where you look.
F3debug screen: block state, signals, events, scheduled ticks.
Ppauses time, period steps one tick.
Escthis menu.
Java 26.2 rules. Circuit layouts have simulator tests; the engine is checked against recorded real-server scenarios. Not simulated: moving entities, TNT explosions, fluids, sculk, crafter, daylight detector, or dispenser behaviours beyond dropping.