Thanks! ^^ It was a very interesting game to make!
The lighting looked better while developing than in the web build, probably changing something in the export configs would remediate this. The collectibles are actually 3D models, but not affected by the lights. We probably could do the same with the kitten, but due to the time we ended up overlooking this.
We also tried to tilt the world instead of just moving the ball, but it didn’t turn out well, and again due to the time we just rolled with just rolling =P