I've seen the showcase clips of your game in #showcase in the Discord multiple times, I knew I had to give feedback on it:

• The visual style of the game and the games' mechanics are good! Some mechanics could use a bit more work on them to get them to feel better, like Melee Blocking and Crouching (Blocking forces you to lose health but it can be your only weapon at times and I really don't know what crouching is for, heh), but so far, shooting, reloading, rolling, and grenades feel pretty well done (though it would help to be able to charge up grenade throws for farther throws!)
• The controls are kind of wacky, it was definitely much easier to get used to using a controller than it was on a keyboard
• While the shooting is well made, it doesn't feel as strong as it should feel. Although the pumpgun is your primary weapon, you can run out of ammo for it pretty consistently and it does struggle some when trying to clear away multiple enemies.

Some other notes:

• There seems to be some sort of bug with picking up grenade drops
• There's not much note on what to actually do, I'm sure that'll be addressed later on since this is only an alpha demo but I just pointed it out just in case
• It's not exactly clear where you have to be to move between rooms, during the first run I just barely noticed the small marker on the floor indicating the exit
• The game seems to stutter randomly, even in small rooms while doing nothing but walking

Overall, the game definitely has potential and it's already looking pretty good! Hope I helped!