I liked this game a lot. With a title screen, settings, and instructions, it really felt like a complete game. I loved the style and the original concept and controls. This is one of the better submissions that I've played this Jam.
(FYI, I think I hit a bug where somehow my mouse buttons were "stuck" down, automatically using gravity. I think it happens when I hold the mouse down and then move quickly to the edge of the screen. )