Neat concept. Setting a level up is pretty cool.
Although I had some gripes:
Moving blocks with physics and frequent pits led to some frustration, I would've preferred to have more control over block placement (maybe via drag&drop) over trying to shove a block with the exact needed force to not overshoot the target position.
Also the Huge Xs in the background where somewhat distracting and made it hard to focus on the foreground objects.
The hand drawn messages and tutorials where a neat touch and having in-game hints is amazing for a game jam title!