Solder — free browser game

Solder turns the circuit-board repair tech's single delicate task into an original precision reaction game. Each shift opens on a dark green board with copper pads (orange discs) scattered across it; around every pad is a dashed cyan target ring. The ring's thickness represents the 'correct amount of solder' for that pad — the faint inner and outer lines show the acceptable tolerance band. The moment you click and hold a pad, solder starts flowing and a silver droplet grows around the pad; when you release the button, the droplet freezes at that size. If you let go exactly at the ring's thickness you get a glossy silver joint with a green halo and earn high points (up to +18 for perfect). Hold too briefly and the droplet can't fill the ring — it's classified as a cold joint and the pad is marked with a red X (zero points). Hold too long and you'll either pass with a small overflow and lower points, or the droplet will grow far enough to reach the neighbouring pad and a bright red SHORT BRIDGE appears between them (no points + that pad dies). Neighbour candidates are previewed as faint orange traces between pads — those are the lines a droplet will trigger once its radius crosses the threshold. When no pending pads remain on a board (all settled) you advance to the next; remaining time × 2 is bonus, then more pads and a tighter tolerance follow. Each shift has a limited timer (top HUD); if it runs out, the droplet in your hand cools at its current size and the game ends. Mobile is the same: touch a pad, keep your finger down, lift when you reach the target. Tip: don't focus on the droplet radius, focus on the ring **edge** — the moment the silver kisses the ring's corner is when you should release. On pads near bridge candidates, prefer a smaller drop: your lower bound is 'cold', but your upper bound puts you on the blacklist. Your best score is saved in your browser.