First of all, I am really happy to see another Unreal Engine developer in here! This game was definitely worth the download! It's enjoyable, it's creative, it's funny, and it hits all the right boxes! The models are great, the gameplay loop is so nice, and just everything about this makes me impressed.
The things that can be improved are the menu and the enemies' death. In the menu, you need to press once on the screen, and only then it starts to receive input. I also had this problem. What you need to do is use the node "Set Input Mode Game and UI" on Begin Play in your menu level. This will allow the mouse to be focused on the menu from the start, and in that way it will feel more interactive.
And about the enemies' death, I feel like it was pretty hard to know if you managed to kill them. Sometimes I returned a bit backwards just to make sure. Even if you can see who died in the HUD, it would be nice if there were a more noticeable sound that indicates a kill.
But other than these two things, the game is actually amazing! It can totally be a game on Steam even at this point.