There is certainly enough great stuff in this game to make Antigraviator worth buying. There is a healthy number of tracks that will take hours to master, cool Gravs and parts to unlock, and it's a joy to look at and listen to while you do it. But with a little polish and workshopping, Antigraviator could have gone from really good, to really great.
Xenoraid does do a lot to try and stand apart from the deluge of similar games out there, and it should be commended for that effort. But with its lack of refinement, progression resetting, and fairly bland overall presentation, it's unlikely we'll be looking back on this one a year from now.