Thank you for the feedback! I put a lot of efforts into making the game not annoying despite the concept, so I'm glad it worked out!
And seriously, I really wish I could have added more! I thought I would have the time for at least more enemies, but it was my first time using Godot and I had to figure out all the export stuff, which took me more time than I would have liked it to. If people like the game, I'll definitely keep working on it! And that would totally include a hold-to-shoot option, or even an auto-fire option.