Lmao that's amazing, your parody lyrics just made my day! I would've loved to add more levels as interesting as that one, but I think I'd need to add other things that you can activate and I didn't have time. Thanks so much for your feedback!!
Potentially long technical part:
In response to your questions, for the button timer I had a Texture Progress node with the texture attached below, set to counter-clockwise fill and a small step size of .01. I then also had a Timer node and in the button's process function I just set the TextureProgress value to the Timer's time_left. I also set the TextureProgress' max_value to the Timer's wait_time on ready.
The sparks are just a Particle2d that I fiddled with until I thought it looked good and set to one shot. Then when I needed sparks to appear, I'd just set the position of the Particle2D where I wanted it and set it's enabled to true. If you want to know the exact values I used in the particles2d let my know and I can send it to you.
