The game is simple to understand but becomes increasingly difficult to master as you progress through the levels.
I can easily imagine this becoming a successful mobile game. With infinite randomly generated levels, a variety of unlockable spider types, and features such as limited Undo Moves that regenerate over time (or pay for more moves), it has the potential to keep players engaged for a long time.
It's the kind of game I could see people pulling out on their phones while waiting for a train, bus, or appointment. Easy to pick up, difficult to put down.