Oh, that certainly sets the Christmas mood!
A few comments...
- don't forget to thank the person who helped you with game mechanics
- at the start, I got chain reactions. Maybe make sure there are no chains of 3 at the start? I believe it was covered in the tutorial, but there are other ways, too (like silently removing chains until there are no more)
- when 3 blocks of the same color spawn at the top row, they are destroyed without the animation.
- I noticed that sometimes a block suddenly turns into another color
Keep it up