Play in 1.14. Click the picture to go to the download and view more information.

The datapack SHIFT_c was originally going to be for a puzzle map, but when I started to make the puzzles I realized I'm not clever enough to make anything good with it... but hey! Someone out there might use it! There are three items (lime dye, red dye, cyan dye) that let you manipulate your "weight," allowing you to move it around, destroy it, and swap places with it.