Great job- the art and music is fantastic! Love the wailing guitars. The stealth gameplay is fun, although I made mincemeat of the bosses with my patented "lay 1000 traps" strategy. I cannot stress enough how great this art is- all the pointing guards being their own unique sprites is just so over the top cool. Amazing work!
I also love that you programmed in the leave-able building, I walked right out to see what it would do. The city looks gorgeous for a sprite most people might not see!
Also, and I cannot stress this enough, the feline development team is adorable.