Pretty cool game! The controls are smooth and it feels good to run and shoot.
Slot machine determining ammo mechanics is great idea. I was not lcky enough during my 4 gameplays to get anything other than ininite ammo jackpot, so I can't tell what they do, but the infinite ammo one felt powerful - in a good way.
It was not easy to see diference in special ammo efects when not hitting jackpot, though. I also didn't understood the meaning of spacebar action (I guess it is some kind of a dodge?) or the indicator under the healthbar.
What I like a lot is the UI.
Nice one!