Simple start for a horde shooter game. Not sure it it fits the theme, but well done.
Some small issues:
- not sure if intended, but enemies dying (red animation) still take hits, blocking your shots to other enemies
- does not seem to have a game over, as I wasn't able to get my character killed
- if you stop shooting while still having amno (say 5 bullets out of 8), it does the reload animation but keeps bullets at 5, not fully reloading
Good luck!