Thanks a lot, I really appreciate the feedback and the detailed info! I’m glad you liked the projectile combinations.
I’m actually surprised you felt the difficulty curve was too low. For the first ~40 seconds it definitely is, but after that I felt like it ramps up pretty fast. Based on my code, I honestly thought the game would become almost unplayable after around 6 minutes. The best player I tested it with usually died after about 4 minutes, so you must be some kind of keyboard god, haha.
Do you remember what high score you managed to get?