Nifty. The arbitrary size of the playfield (and its invisible border) was annoying at times, though. More suggestions: * A reset button when things get too m

Nifty. The arbitrary size of the playfield (and its invisible border) was annoying at times, though. More suggestions: * A reset button when things get too messed up * A "check my work" button that highlights errors, which can be hard to see when there get to be a lot of points and edges * Ability to select and drag multiple points (particularly useful when you need to shift an entire section over to have more room to work * A clearer explanation of the UI (I was reluctant to click on the diamond icons for fear of losing my progress) * Some sort of ending (even just a "Congratulations" message)