Heya, I got quite a few things to say about this song:
First of all, I am curious why you only published song 3 and 5 to Newgrounds. It makes me a little curious as to what the rest sounds like.
Secondly, the song itself. I must say that I am having a bit of a double feeling about this song. It classifies itself as a 'commercial' song, meaning that it would probably be a typical ad song or something (I don't exactly know what kind of commercial I would imagine with this).
But when the rock part kicks in, I think the part sounds a bit hollow or empty. It only has, like, a bass guitar, some rock guitars and a drum kit, further on not much instrumental in this part. I don't dislike this part, but I honestly also don't really like it that much. It just comes too suddenly, almost in a fashion that this 'commercial song' tries to be unpredictable. This might work greatly with your other, more electronic stuff, but here I don't think it's exactly fitting. (The way I feel about this part might change in the future, but for now, this is what I think of it)
As for the part after the rock guitars, I must say these instead sound very full and well tuned. It's really pleasant to listen to the piano's in this part of the song. Then it further evolves onto this note, with more instruments adding in on the piece as it progresses. When the bitrate comes in, I felt like there was something about this track that I don't feel comfortable placing next to the word 'commercial' (I guess I am bringing up 'commercial' way too much here) in this case: emotion.
This song goes from an okay piano solo with the same drums as Song number 3 into a rock song, into an emotional piano & electronics payoff. I really like this part, though, don't get me wrong, but I am not 100% sure if it works in the context of this song. If we leave this aside though, I like this song way more than I don't, and that's especially thanks to the part towards the end. It sounds really well produced, and it's pleasant to listen to it with headphones too. Further on, I must say, you did a pretty nice job here. It's very different from your usual works, but I kinda like it too.
So, overall, I feel a 7,4 out of 10 is into place here. I round that up to 4 stars for literally the end part alone. Well done.