Haven't finished Astrobot(kinda stopped at i think world 4 or so, heard a difficult challenges patch is coming before winter iirc so holding of to let them polish a bit more until then).
It has some neat ideas and moment to moment stuff with lots of graphical effects, but like some mention, it feels a bit too easy (balanced around the 1hp im sure).
Also there was a mechanic I dont recall exacly, but I think it was that I noticed that if i were close to fall down, the game "course corrected" my placement to make sure i didnt fall off or something similar to that, kind of like mario karts autosteering, which kind of annoyed me when it happened since if i do a mistake i should just get punished for it or try to correct it myself in a game that is about platforming, the devs not trusting the players is just a miss and should just be a toggle in the options imo.
I would say it would be more fair to compare it to kirbygames, easy but from the sound of it has hard moments late postgame, with lots of gimmicks to play around with for each level and kind of big focus on finding X to unlock Y rather than running a tricky obstacle course.
Tropical freeze not only has great levels, the background alone told stories in a way I think no other 2d platformer has done to that extent since while also being as close to perfecly balanced difficulty it could have., got memorable music, precise control, movement that you can work with to optimize thats not just surface level (different chars makes it very different as well, but that some of the gimmicks in astro bot does as well, just not on every level to the same degree). And also being a joy to replay gives it the win in my book, Astro bot has a mountain to climb higher but there is still some game left to beat so maybe it gets better (4 worlds in the game should be harder than it is though).