This is a fantastic game!
It's been a while since a good, well-designed, atmospheric cinematic-platformer came out. And you got every good thing about the genre down to a 'T'!
PROS:
+ Fantastic environment
+ Great character design
+ Amazing music and sound design
+ Cool stealth-based gameplay
+ Gameplay mechanics are revealed organically instead of in a tutorial-styled design
CONS:
- Controls are a little slow (and confusing) at times. But then again, Flashback on Sega was even more confusing :P :D
- I would love to see the movement of the characters in classic style as well, instead of them "sliding".
I look forward to more from you and would love to see a full game based on this!
OUTSTANDING WORK!
P.S. I found a small bug when I was trying to leave the cat-eyed robot/alien near the bars and, at the same time, trying to get through the bars. As you can see from the gif, the character just stays there, "compressed".
I was playing the game in the browser on Firefox.