The graphics and sounds were nice. Sitting on bench was nice too :P
I wasn't completely sure how the main mechanic worked at first, but it turned out to be quite easy to learn. Having the different ways of visualizing the fractions threw me off at first for some reason.
Btw I noticed one bug, you can solve the puzzle by placing say 1/2:s on one trio of slots, and then reusing the same ones on the other two slot trios. It doesn't undo the solved slots after them out.