As others mentioned the spikes were definitely hard to see. It also would have helped to have some more obvious visual effect when that first set are taken away by the fire door.
I also wished the camera stayed a little more centered on the character. Early on especially I felt like I running into an area I couldn’t see and therefore couldn’t really react to. That may be a part of the problem with the spikes. And that was probably exacerbated by not having checkpoints.
But ultimately, those things didn’t stop me from having a good time with this. I really liked the mechanics here and I think you did a great job of teaching them and introducing some interesting interactions. I also liked the mash-up of ninja and modern surveillance aesthetics. The music was also great. Really intense and very fitting to the setting.
So in the end, some rough edges, but nothing too difficult to smooth out, but otherwise great execution of a cool idea. Nice work!