I played this back on mobile and was impressed with the overall smoothness and playability of the game. There are some minor flaws of course - reused graphics, and some weird physics when standing on moving platforms - but for the most part the game feels comfortable. While it's good that the game is simple (as the controls on mobile really don't lend themselves to complexity) I would have liked to see a bit more environmental variety - perhaps different kinds of enemies, or platforms that offered more than the basic Unity physics prefabs.
Most of the issues dealing with actual enjoyability stem from level design. A lot of the difficulty is concentrated in the earlier levels, and while you can usually skip particularly hard levels and farm eggs elsewhere, it's still weird that the second half of the game (and bosses) are comparatively easy, especially when the bubble level is downright brutal (and frustrating, since it's so easy to slip off of them.) It would have made sense to make all of the levels somewhat easy, but for the eggs to be put in especially difficult places. On that note, it would have also been nice for collecting all eggs in a level to provide something, even if it were only cosmetic such as player skins.
Overall my biggest disappointment here is that the game feels like a very generic platformer, even though I've known you to come up with some really outstanding original concepts such as Nodes, Draw Play, and Battle Fish. Battle Fish in particular strikes me as a game that could be outstanding on mobile, given its simple control scheme as well as how much more enjoyable it would be in a less laggy platform such as Unity.