This is such a unique idea! I can't imagine ever in a million years coming up with a concept like this.
The vibes and colors are nice, and everything plays very smoothly.
As is often the case with dice positioning games, forgetting or not knowing what is on the non-visible sides of the die can make strategizing a bit difficult. I found it much easier to just have fun running and dashing around and getting dice to ignite by chance.
The isometric view also made it a bit tricky to spot where new dice were going to fall once the screen started to fill up. I know there are other viewpoints, but honestly I'm not sure they would've been more helpful. Not sure what the solution would be for this problem... slower blocks falling? Or some sort of highlight around squares where dice are falling to make them a bit more visible.
Regardless of those criticisms, I really enjoyed this. Plus it's always nice to see someone else working in Godot. Well done!