Fantastic game, great fun. I could never play Katamari Damacy, so I toally can't tell you that there are similarities

Of course, given that this is an Alpha, I probably can't expect too much as far as variety of objects go. Yes, I'm aware that there are plenty even now, and I can't say that I don't love apples moving in paths (after all, who doesn't?!), but still, a few more objects and a few less cubes would be awesome.
The game itself was fun to play. It's stupidly addicting to grow more and more. Due to the environments, you can also see how big you are compared to things everyone knows. Still, you should add a small text somewhere on the screen showing me that I am now x metres (or feet) tall. Shameless plug: In my own game
Trouble Tower, I included an option that always compared the current high to important landmarks. Maybe you could add an option like this and notify me when I surpassed the height of a blue whale or the tallest oak and whatever you can think of. It's always motivating if you surpass real life!

The performance was pretty bad on my computer. Given that my computer isn't exactly new, that might be okay (depending on your target audience), especially as you'll likely improve the performance. Did you have the sun move around the whole time? The shading of the objects changed. I don't know if that effect is really that great, but then again, it doesn't bother me either. Maybe one could do more with that. In case there are any more shaders (I distinctly remember something that looked like blur around some moving objects, but that might have been either transparent models you create behind them or just my eyes playing tricks on me (I'm tired

)), then I would love the option to switch them off. Also, when you have a lot of objects collected, then the game naturally becomes slower. Maybe you could remove smaller objects or go a few LOD-steps below (although the models seem kinda lowpoly already!).
Speaking of the objects: Everything that lives should be animated. The spiders should move their legs like crazy and the humans too. They could even say something. Like "Oh, not again" or actually something funny that I can't think of, given that a) my english sucks (I was told that this is in fact the case, so I now use this as a poor excuse for almost everything) and b) I'm not funny at all (strangely enough, I was told that this is the case as well! Cruel world, huh?)
The controls. Oh, the controls! I see you included inertia. I could understood that if I were controlling, say, a giant ball that all these things stick too (hah! How could I think of that? The very idea!) but given that I am some kind of badass super mega-roboter, I should have a little less of that. Yeah, I'm fine with a little inertia and you might even increase it the taller I get. But especially at the beginning, I should have no inertia at all, given that I am, in fact, without any mass. Aside from the magic light I emit, but given that its magic, it shouldn't have any inertia. Or maybe
magic inertia.
The camera... Could you, please, add a way to change cameras tilt as well? That would be great. Often, I run around and I think "man, I wish I knew where I am walking right now", but I don't know, because the camera finds only the floor suitable enough for me to see. Don't get me wrong, there are some very nice (and some very simple

) floortextures you have there and I appreciate your effort to show me these, but sometimes, I just feel like watching other things that I may deem more important depending on the situation. True, in some situations, few things are more important than the floor I'm walking on (speaking of which, I totally thought I'd fall through the floor in the pacman-level and when I didn't, I was like "whoa, there even is that cool-looking thing down there! Hello, cool-looking thing!", when a ghost bumped into me and I was very surprised, given that I couldn't see him), but you should still provide me with the option to at least have limited control about the tilt of the camera. Or maybe there is one and I haven't noticed, in which case you may please ignore the above.
Whats even more important is that the camera just goes through everything and lets me the the other side of the fence when I would really need to see the player (as much as I love the texture of the fence). So add collision to it! Also, sometimes a little delay in the cameramovement (but just a small little delay, as if it were accerlating) can make the whole thing seem more dynamic. Maybe thats worth a try.
I like the artwork. by which I mean, the menuscreen and the ending screen. It's simple and not really that much too look at, but its clean and has a distinctive style. I like it. And at the end, a voice talked to me! It told me that my grade was either "C-", "D" or "C", which probably means that I should be ashamed and refrain from posting it here. A grade system is a great motivator though, so I am fine with it.
However, some of the textures are painfully plain. Yeah, right, its "toony". We get that. A little more detail is allowed, anyway. Although I guess that will be added and is just one of these "alpha"-things.
What I really miss is a score. At the end it tells me the amount of objects I collected and I am like "Oh, nice". I'd love to see some more statistics. How tall was I at the end? What was the tallest thing I collected, how many living things have I found? Then, you should include a scoring system. Say, (I love inventing scoring systems), say every object gives a base amount of points depending on its size (either on categories (10, 20, 50, 100, whatever) or directly tied to vec_dist(my.max_x,my.min_x)*k or whatever). Whenever I pick up an object, I have x seconds to get more. When I get the next one, the timer goes back. The sum of the score of the objects is multiplied by the amount of objects I had, that number is added to my score. Yay for combos! You could also add powerups that increased the time for combos or something along these lines. Or, you could create a completely different combosystem and ignore what I just said! Because otherwise, I might just sue you for using the combosystem I totally ripped off from the "Tony Hawk"-games.
Back in the day, games used to increase the speed of the music when the time ran out. That might be cool in this game, too! Everything that makes things hectic (without any loss in control) and gives the player a little stress is good!
So, in summary (because often people complain about the length of my posts), this is my wishlist, that you may or may not ignore: Decrease the amount of inertia and make it proportional to the size of the player. Show the score (by which I also mean: create a scoring system) and the size of the player. Improve the performance. Give me options. Improve the camera by letting me see everything (i want). More objects.
Despite all this, the game does look very promising and is exactly that kind of crazy fun that I absolutely love. Great work.