Very cool concept, well introduced. Great atmosphere.
I wanted to love it but ended up tearing my hair out in frustration. The crate puzzle - 60 deaths or so. I eventually gave up beacause of what appeared to be bugs - the crate would only respawn if time wasn't stopped, so I had to kill myself loads of times just to get another crate. Then there was the fact that the laser dots killed me even when frozen (not the laser itself, the particles which hit the box.) So many times I got the crate to block the laser nicely, then died to a stray particle. In fact, now that I think about it, these two things are related as you can only die in freeze mode if there's something wrong haha.
In the end I got really annoyed and ragequit. I only ragequit because it was something I was really enjoying and wanted to finish!
Anyway, I hope you make it a tiny touch easier if you come back to it. I'd definitely try again.