I'm not sure whether to give this a yes or no recommendation.
Having played the pre-Steam version and now the Steam version, I have to say, this is a...decent platformer. But I'd hesitate to call it any more than that. It's certainly playable, basically bug-free, and accomplishes what it sets out to do, but it just...doesn't seem to feel all that fun, to me.
Specifically, the gameplay feels very, very linear and constrained. There are few "creative" solutions possible to problems -- it's like, there's the obvious solution, and then that's it, and any attempt to try something less obvious will result in failure.
+ nice, colorful visual designs
+ simple, easy-to-learn controls
+ vaguely interesting storyline, with visual details that correspond to it
+ secrets are easy to find (good for completionist nuts).
+ low basic difficulty (good for people new to platformers, such as children).
+ bonus challenge levels for more advanced players.
- is too long to keep interest. The gameplay stays largely the same, through all the levels. While some enemies are defeated in different ways, and new stage hazards are introduced, the core gameplay of non-boss levels is essentially identical. Each level drags on a little, and then having all these levels just drags it on even longer.
- some boss fights are rather tedious. Example: the second area boss (the rock boss) -- if you screw up twice or touch the lava, then you just have to wait through that whole cycle again.
- gameplay doesn't lend itself to easy skipping. If you screwed up earlier and respawned at a checkpoint, you'll still have to go past those same obstacles. Though at least in this current version, stars stay collected and enemies don't respawn, which is a good thing. (Bomb walls respawn, though.)
- controls are a little floaty in some ways. (e.g. jump height) Hit detection is pretty reasonable, though.
- some inconsistencies. For example, red-aura enemies are supposed to be invulnerable, but some can be defeated, while some enemies without red auras are invulnerable. If you're going for max points, this will annoy you.
- gameplay leaves very little room for creativity. Moving faster is one example, speeding up boss fights is another. You just can't do these things. Crushing stone blocks are designed such that you can't run past two of them at once and you simply must wait for them one by one. You can't move fast enough to pelt that boss with two bombs in one cycle, nor can you pick up bombs in mid-air.
The soundtrack is okay -- not particularly notable. It becomes a little repetitive, but this is because (1) the same track gets used over multiple levels, and especially (2) the track starts playing from the beginning every time Oozi dies and respawns, making it more repetitive than is necessary.
Overall, this is a platformer with simple, straightforward, easy-to-learn controls, which are decent (albeit a little floaty). I'd recommend this for people who are looking for a first-timer's platformer, especially for children given the flavor elements (i.e. the whole story about an alien visiting Earth, which looks nothing like Earth anyway in the game, haha), and it's a solid game in that regard, though there are probably better offerings out there, such as Mutant Mudds Deluxe with its very good learning curve which leads it from easy to more challenging gameplay. Meanwhile, anyone who's played at least a few platformers will probably find this rather boring.