Absolutely great game. The concept is good, the controls are nice and polished, and even the levels are great, and there are many of them. Impressive that this was all done in only one week, and by one guy. Small things like the main menu, the level selection, the undo button and the camera movement just made it a joy to play through all these well designed levels.
I think it was a little hard to see what hexagon i had selected, and the orange ones are a bit hard to tell from the red ones though. Maybe you could make their colour a little more different, in a post-jam release?