Fairly disappointed.
If I were to be particularly honest, this game, which uses the same concept as 'Gravity Guy' and a few others, seems horribly underworked; there are some avoidable glitches within single player, it will often lag significantly (and no, that won't be caused by my OS) and its graphics are absolutely poor(!); however, it does provide a considerate challenge, BUT the rate at which the difficulty changes is ludicrously steep.
If you compared 'Gravity Guy' to 'G-Switch', you'd notice that 'Gravity Guy' will tick more of the right boxes than the latter, making 'G-Switch' look more like a pile of scrap metal(!); I also noticed that the multi-player modes BOTH use the same maps, but I don't know when 'Gravity Guy' was released, so I suppose that point is rendered superfluous for now.
Nevertheless, I didn't fully appreciate 'G-Switch' compared to 'Gravity Guy', all in all; personally, I believe that 'G-Switch' lacks the "flavour" necessary to make it brilliant, if you know what I mean.