nice work. I think you implemented pathfinding to move enemies towards you after a time. I found some bugs in it.
1. After death, the restart button doesn't work, and it's still shooting instead of restarting.
2. No quitting option. As you submitted for the Windows platform, the quit option after pressing escape is good to implement.
3. You used standard assets for moving the player, which is ok to add, but it may cut your point.
4. No, shooting particles, which is not telling me that even I hit enemies or not.
But after all, it's a good game.