Drag a train path from A to B (note: still needs to allow click to cycle fills, but not drag)
Paint by Numbers
Slitherlink
Wolves and Sheep
Slitherlink with wolves on the outside and sheep on the inside.
Tents
Wordsearch with clue toggling and a hidden message
RED
ORANGE
YELLOW
GREEN
BLUE
INDIGO
VIOLET
Spokes
Draw a single network consisting of a number of spokes from each circle matching the number in the circle. Spokes cannot cross each other. Although hardly necessary in this simple example, note that you can mark invalid spokes.
Hidato
Fill the grid with numbers 1-25 such that you can draw a continuous sequential path between 1-25 that only visits each number once.