Bahahah!! That was great. I love how you are essentially an old man picking up scraps. It made us LOL! Also, fun game mechanics.
Here is our game if you want to take a look:
https://itch.io/jam/wowie-jam-4/rate/1662911#post-6447011
Viewing post in Rate for rate! Come try "My Friend Roby"
I actually had tried your game prior to your post! Really cool take on flappy bird concept.
1. The separation from the killing mechanics from the background/world. It was difficult at times for me to understand what I was running into to die .
2. I would recommend to increment the players score for every second they stay alive, and have shooting an enemy be worth like 3 or 5 points. this gives the player a reason to want to try to live as long as possible, but at times risk trying to kill an enemy for points!
Good work here!