The game concept is very fun, it reminds me a bit of the classic pen-and-paper game Dots and Boxes (since you have to claim area by closing loops).
I wish singleplayer mode was a bit more challenging, since I beat the computer pretty easily on both the regular and hazards maps without much difficulty. It would also be nice to also accept left/right controls instead of A/D as input for singleplayer.
The player and CPU movement mechanics are very smooth and impressive for a game jam, good job on implementing them!