This felt very old school. That was mostly good. The music was great. Very immersive.
Gameplay-wise, I felt like you moved very slowly. Also the aiming was tough. There was no indication of whether I was hitting, and there seemed to be no indication that headshots had any effect. I just knew my sights were on them. Even though I approached slowly and I got ganked.
This was the last game I rated. (I played them all.) Because I couldn't get it to play in the browser. With a game this large it would be nice to have a download option. I did finally get it to work in the browser.
It's a good start, but since I didn't get very far, I didn't see how this is a Metroidvania.