It's nice,but didn't this game already exists?

I honestly can't think of a reason for why it is rated 2.27/5. This game is great, and I would love to see in the App Store (I don't know how to add it there). It looks great, it's original, it has cool effects... You can make incredible things in Unity! The only thing I can suggest is to add more levels.
PS: "complate" is actually spelled "complete" :-)

It's functional. The cube can be prevented from sliding off of the sides (acknowledging that the horizontal movements make the floor feel like it's been coated in butter) with a single press of the opposite direction. With that key method in mind, beating this game will only take you about a minute, as there aren't many levels. I guess one might suggest you could add more levels to this experience - the difficulty curve here is reasonable, nothing kaizo-esque or IWBTG here. I had fun and enjoyed this fast experience. Nice one.

This works, but is nearly unplayable. The cube slides right off the sides when you use key controls. It makes it too difficult to avoid the approaching blocks and not fall off the edge. Speed of the oncoming blocks also plays a part in this. With mouse controls, you can control the character better, and would be better suited to this game.