Let's trade feedback. I submitted a project too.
- Visuals: I like your map layout and design. It's mainly background scrolling right now but you did put thought and effort into it instead of copy-pasting or just having a bland color below the plane. I recommend you enable the Full Screen button for this game.
- Mechanics: The plane moves a bit odd at times. I can't seem to fly downward. The enemy planes fly directly at me each time it's not as much fun. I recommend you study how Pac-Man ghosts work, as they go to the player.
- Enemy Changes: The First Ghost targets the space behind the player. Next ghost targets two spaces in front of where the player is but on a delay. Third ghost takes paths adjacent to the player and goes close when certain distance away. Final ghost chases player at different speeds and often chooses to go off-screen to catch the player by wrapping around the maze. All of the ghosts are try to Kamikaze kill the player but their routes make the gameplay super dynamic. Your planes could use different approaches in chasing, if you do choose to expand.