Making a full survivors-style game with 50 waves, upgrade cards and bosses in a week is insane! The arrows lighting up the dark is a really nice use of the theme, and the hand-made art has a great consistent style.
One music tip from my own jam game: the loop is quite short, so it gets repetitive after a while. What helped me was duplicating the loop and removing the melody from the first part, so the melody only comes in after a few bars. It gives the music some room to breathe and makes it feel a lot less repetitive.
Really impressive work!