Game is too easy and got boring after 3 minutes, got boring before that actually 3 minutes is just when I decided to quit because I will never die. You’re using godot. For the audio/music if you want it to play even when the game is paused then in the audiostreamplayer that is playing the music it needs to have process mode set to always instead of only when the game isn’t paused. Personally it doesn’t make sense to have enemy spawn rate be an upgrade, that’s usually the difficulty curve of a game not the part of the game the player has to keep upgrading because the game is too easy.