There really was little to no thinking involved in the puzzles. Come to a dead end, find phase shifter, get new key, go through dead end, repeat.
Health had very little point. No punishment for dying, slow and clunky controls.
Worthwhile concept to explore and nice artwork. (variations on music were good too)
Overall, just could've used a lot more time on level design + story.
wow some people have never played platformers or something. And can't think. Making Up/W jump would be absolutely stupid as soon as you switch gravity's direction. A D-Pad plus a separate jump button has been the dominant standard (and for good reason) since the earliest days of Mario.
Good game. Gets really laggy occasionally though for some reason.