I LOVED your game. First, I was immediately hooked with the characters names (Gabriel and Lucifer) which its a good thing cause your text dump is BIIIIG. But since I was hooked i didn't mind. Then your battle system is quite fun, it was so fun that the first chance i got, I maxed out my gear , all melee, guns protection etc. It was quite satisfying to get the best gear.
Balance is ok, but its a bit on the hard side, unless you max your gear. The boss I think its quite hard, It has way too much HP and since I grind for hours, it shouldn't taken me so long to defeat.
One thing that could really work well with your system is the ability to change weapons mid battle (from melee to guns).
Also, your skills action sequencing was really good too!
I have quite the fun experience, congratulations to great entry!!