The lab hit a snag and recovered to the menu. Your saved progress is safe.
Nice session. Take a stretch, then come back for the next chain.
Welcome back
Build the chain. Light the star.
Place reactor pieces on the grid, then press Launch. The spark travels piece to piece. If it reaches the golden star, the lab lights up.
Daily quest: solve 1 lab
Local bests:
No solved labs yet. Your first chain is waiting.
Challenge code check:
Choose a lab
Every lab is checked by the lab solver before you play it. Solved labs stay marked.
Lab 1
0PIECES LEFT
0CHAIN STEPS
0sTIME
3HINTS
Tap a tray piece, then tap a grid cell to place it. Tap a placed piece to lift it again. Keyboard: arrows move, Enter places, Backspace lifts, L launches, U undoes, H hints.
Lab lit up
Chain fizzled out
The spark stopped before the star. Lift a piece, try a new route, or take a hint.
How to play
1. Tap a tray piece, then tap an empty grid cell to place it.
2. Relay fires in all four directions. Splitter fires diagonally. Booster jumps over one cell, even over a wall. Arrows fire one way only.
3. Press Launch Chain. The spark starts at the glowing orb and travels piece to piece.
4. Reach the golden star to light the lab. Undo and Clear are free, and Hint places one correct piece.
5. Daily gives every player the same lab for the day. Free Run works through all 40 labs. Relaxed mode has unlimited hints and no fail penalty.
Tips: start from the star and work backward; a Relay next to a wall wastes a direction; Boosters are the only way across a wall row.