Just beat this. I really liked it at first, but as I played on I kept getting less and less interested and kept thinking I should be spending this time playing all the great retail Vita games I haven't touched instead.
It's a very solid platformer, don't get me wrong. Good length for the price, nice clean visuals, eating stuff and growing is satisfying. But there's never any moments of genius. No sections in the game feel extremely well designed and satisfying. Everything is just kind of doing the motions. It feels like a smaller dev putting out a early game where they're learning how to make great games, but it never feels like a great platformer by the big boys.
It also has some things I didn't like:
-TOO MUCH TOUCHING. The touch puzzles/platforming mess up the pace because it is a GAME YOU ARE PLAYING WITH STICKS AND BUTTONS and then suddenly you have to reach into the middle of the screen and start moving/spinning things. I thought there were too many of these sections, almost none of which required any skill and were just like "HEY, LOOK YOU CAN TOUCH ON THE VITA" blah. Plus sometimes I'd lose a few lives because the physics would go wacko on touching speed.
-The top-down rolling stuff kind of sucked. The ones where you have to be accurate and avoid pits was basically like similar Mario Galaxy stages except waaaay worse. The physics were funky and if you even touched the outside of a pit ring you'd die which was kind of annoying. Then the non-pit stages were just boring. There was nothing wrong with the tilt stuff, but...it just wasn't fun gameplay.
-Likewise the flying sections were pretty boring. Not much challenge to them and there were tons and tons of flying sections. I'm enjoying the platformer parts and then it's zzz boost/flying land.
-The core platforming was just ok. Because of the floating physics there's not much that's particularly challenging platforming. It's just sort of doing the motions with occasional puzzles. Which is ok, it just doesn't stand out.
-I felt like the size thing was all screwed in terms of sense of scale. Mainly because even though you were growing and growing every stage, you would always start the next stage smaller than the size you ended the previous stage which makes zero sense! It always makes it feel like the growth is really slow since you take two steps forward and one back. I would've preferred if each stage started from where the previous one ended and the stages kept containing bigger and bigger objects to eat.
-Too many one-chance missables. Especially ones where you miss it and then even if you quickly blow yourself up, you start after it. I like being able to take my time and get all the collectibles in one play for each stage.
Other things I liked:
+The collectibles are fun.
+Good leaderboards and use of online.
+Pretty good trophies.
+Fun music.
+Controls felt good.
Overall it's a good game. What keeps it from being a great game isn't even a lot of the nitpicky stuff I described, but rather that it just doesn't have enough mechanics to stay fresh. You have platforming, touch bar things, boost flying, magnetics....and that's about all there is for the entire game. Just areas based on one of those 4 mechanics. The game needed a few more interesting mechanics to keep each world feeling fresh and interesting. And in the end it just needed better level designs.
But it's a good start. I'll definitely keep on the look out for their next game and I would recommend this one to almost anyone, though I might tell them to play their AAA retail/psn titles first and get to this later on.