Overall cool song! It's got a lot of cool dynamics that keep the song interesting. I just have a few critics that i think could make the song sound better, but they're just my opinons.
when your vocals first come in at "It's Kitty Chaser" I think you should bring in the bass at that point. It will fill out the sound a bit more.
At 0:57, when you start doing that guitar riff faster, I personally would pick all the notes rather than pulling off to give it that aggressive feel and would probably sound cleaner.
At 1:37, i'd do some kind of instrument change here to go with your vocal melody change. Such as bringing in an additional guitar and playing power chords or what not. whatever would fit, but it sounds anti-climatic as is.
At 2:22, when the solo begins it feels like it should be more intense. Guitar power chords at a higher octave would probably be easiest to do this.
Anyway, thats my 2 cents. Sounds good, keep it up.
Cool song. The last voice could be a little bit more "heroic" but it's cool anyway.