this is a fantastic project! i have a few suggestions for quick improvements, i hope you will consider
(1) add a "skip" button to the intro cinematic. many players may prefer to skip the cinematic, especially those who are replaying
(2) add a heat meter to your weapon so players can manage their firepower better. AND adding manual cooldown would be very good, so players can cooldown whenever they like
(3) is the game intended to be in English? i see you are creating a beautiful atmosphere, but your writing has some simple errors that takes away from the experience. i would be happy to edit your dialogue for free. i love making games and writing especially
(4) recording a real voice would also help alot. even amateur voice actors sound better than robot text-to-speech
keep up the great work! i hope you'll keep growing this project!