It's pretty fun, but I can't see myself playing it for too long without having more options than just shoot or grenade, because it felt like I'm just running around trying to extend my run while spamming left click on whatever comes to me. Maybe you want to keep it simple, but personally I would like for there to be more options both in movement and combat. I would love to be able to rocket jump, bhop etc. while doing all of this. Having some special secondary fire for guns?
I also thought that the deagles take up just a bit too much of the screen space and it would be cool to give them some cool animations similar to how you can spin your gun around in Ultrakill.
That's just the things I like in games though. Nothing wrong with the way it is right now.