Having just played Tiny Crate, I was pretty excited when I saw that Harmony Honey had created other platformers, and well, to sum up everything, I wish this game's kickstarter hit its mark.
Walking off ledges rotate your world and gravity, punching blocks makes their gravity go in the direction you choose for them, spikes do the thing spikes do in every game (try to avoid them); it's a really simple formula that has so much potential for mind-bending, extremely convoluted puzzles, and this demo only showcases the very tip of the iceberg of that.
There wasn't any types of glitches or sore spots in the game that I could find; the only thing I could recommend the dev (I saw a few comments that ROTA might have a future) is to make the directional boxes have less movement when their gravity is changed so that you could potentially incorporate juggling more boxes in later levels. Aside from that, great work on this one!
All in all, play this game, find a way to support this developer, and 5 stars all around for this one!
My playthrough: