My implementation is a WIP. It need the following improvements:

• Currently there's no collision detection and tiles can go on top of / beneath each other
• The tiles are rendered in the order of their creation. This means that the tiles that are created earlier may stay behind the ones created later.
• No solution detection. The player should check the solution for himself/herself.

A logic puzzle invented by me. The objective is to connect horizontally and vertically adjacent dots by clicking between them so that the lines form a simple loop with no loose ends that goes through all the dots (so the line forms a Hamiltonian cycle on a grid). The lines of the loop enclose an island. The island is exactly one square wide at all places, that’s why and I call the paths “alleys”. Where 2 or more alleys meet at a right angle, there is always a number indicating the total distance from that square to the shores in all directions – East, West, North and South. Detailed solving instructions

Looper is a puzzle game invented by me. The goal is to arrange the lines on the grid so that they form a simple loop that covers all the dots (Technically speaking the lines will form a Hamiltonian cycle). Drag the pieces with the left mouse button. Hover the pieces over the icons in the bottom area of the window to flip / rotate them. You can alternatively flip the pieces with the right mouse button and rotate them with the mouse wheel. Video

An interactive tangram puzzle.

Izzi is a matching puzzle designed by Frank Nichols and made in 1992 by Binary Arts (now called ThinkFun): "This pattern matching puzzle consists of 64 square tiles, each printed with a black and white geometric pattern. Your goal is to assemble the tiles into an 8x8 square following the IZZI rule: In order to place two tiles adjacent to one another, their colored edges must match up precisely."