One Shot Death

INSTRUCTIONS:

WASD (or arrow keys) to move
Click to shoot (hold down for continuous shooting)
Bosses spawn every 10 seconds
(even if you didn't kill the last one!)
Your bullets collide with their bullets -- use this as a last-minute shield!

I made this game in 48 hours for Ludum Dare 51, where the theme was "Every 10 seconds." This was my first Ludum Dare game. The source code is available as a ZIP file below. The game was made with Godot 3.5, graphics were made with GIMP, and sounds were made with sfxr and BeepBox. The font used is HelvetiPixel by pentacom (released into the public domain).

Please leave feedback including any and all comments, criticisms, and compliments! Thank you!