Fantastic throwback to early FPS games. The Quake inspiration is very obvious, but it was an appealing homage to a classic. I quite liked the dash mode and how you actually incorporated it into the levels. Kind of adds your own flavour to the genre.
One thing I will say is the levels feels very labyrinthine. The flow of combat often came to a halt as I found myself running back and forth along corridors and into rooms trying to find where to go next. Sometimes doorways weren't obvious (hidden in shadows, for example). Also, it took me a bit to realise I had to hold "jump" to climb ladders. A little hint would have helped there.
Other than that, I am very much looking forward to the full game. This has great potential. I will be keeping a close eye on progress.