Good short fps game, I think that a crosshair would have been a good addition to know where I'm shooting at.
Overall the controls were smooth, and the music remix was nice to have. the gameplay loop is there, so I think that it would be straightforward to add more levels, and bosses like Kronii.
Also great to have graphic settings, since it felt a bit laggy on max settings, but I was able to run it smoothly on medium.
Nice job!