In Hard mode, enemies will bungee back and forth while firing their patterns faster than on Normal mode. In Destroy mode, you can fire back at enemies, and have 3 lives to complete the game. In Survive mode, you have one life, and surviving for 15 seconds clears the level.
Thanks for playing! I appreciate any feedback. This is my first game using Pico-8, so if you are running into problems such as performance issues, glitches, etc., please let me know.