Well, being someone who listens to classic NES, SNES, Gameboy and all manner of chiptune music on a daily basis, I think I am probably the most qualified to comment on your album. Now, I'll be frank, it's not good. For a couple of reasons:
1. Normalization is not there. Everything is distorted, like you over-amplified the audio and that makes it sound really bad and can actually blow out speakers if played like that for a long time.
2. The music has no structure. It sounds very random and that makes is messy and incoherent.
Now, I will comment on how to make it better and not just shoot it down. In fact, I encourage you to continue because I personally love chiptunes and think there is a lack of it here.
1. Normalize your audio to 100% and don't blindly amplify. If you are using either Audition or Audacity, there are Normalization options which will auto amplify the music to its peak maximum. Meaning, if your peak is near the middle and much higher than the other parts of the audio, it will only max out there, but you can amplify that further in smaller increments. Use your best judgment.
2. Structure your music better. Listen to some classic C64, NES, Gameboy, Game Gear, Genesis, SNES music and listen to how they do it. Gain some inspiration. The interesting thing is that those same composers took inspiration from classic, rock, jazz and other forms of music to make what they made and most of it came out very well. It's a lot more work, but well worth the effort.
Do this for your music and it'll be much better. I hope you continue to work on it and mold this music, or future music, into something grand and exciting while still being chiptune. Good luck!