Hashi
Connect the islands with bridges.
How to play
Build bridges between the islands so each island gets exactly as many bridges as its number. Bridges run horizontally or vertically, cannot cross, and all islands must end up connected. Drag between two islands to build a bridge — drag again for a double bridge.
1─322─21║║│││2─7═7═2│22│║│1─2││4═7─4─5══4││1║│║│2││5═6═5─1││1││1│1─2─34═5││2─4═3││║1│││12─4─3──21