Bridge Islands — free browser game

Your goal is to connect the numbered islands on the board with bridges. The number on each island is the total number of bridges that must connect to it (a double bridge counts as 2). Bridges can only be drawn horizontally or vertically; they cannot jump over a third island and they cannot cross one another. To make a move, first click an island — a highlight appears around it. Then click a neighbouring island in the same row or column: a single bridge is drawn between them. Click the same pair again and the bridge upgrades to a double bridge; click once more and it is removed entirely. There can be at most two bridges between two islands. An island's ring turns green when it has received exactly as many connections as its number; if you exceed the number the ring turns red and the puzzle won't solve until you fix it. The level is complete when every island's connection count is correct and all islands form a single connected component (that is, you can travel from any island to any other across the bridges). There are three difficulties: Easy 6×6, Medium 7×7, Hard 8×8. Your fewest-moves record is saved for each difficulty. Tip: solve the high-numbered (5+) islands or those crammed into a corner first — they have few options and help you build out without over-constraining the rest of the board.