Investigate the first quardant of the Cartesian coordinate system by directing a robot through a mine field laid out on the grid. Simple Maze Game is one of the Interactivate assessment explorers.
While not particularly user-friendly creation-wise, it is pretty easy to pick up on what you can do. It has math topics: integers, fractions, concepts, and geometry. Within each, you can choose specific concepts, level of difficulty, and the number of problems. Then, simply send students to the URL, and they can take a fill-in-the blank quiz and see results immediately.