I adore Panel De Pon, but this didn't click with me in nearly the same way. The new garbage blocks blend in with the other blocks visually and mechanically, really mess with the control you have over your board in an inconsistent and confusing way, and are extremely difficult to intentionally make chains out of for the kind of back-and-forth volleys of big attacks that I like to see. The other new mechanics didn't do much for me, either.
That's just me being a purist and wanting more of the original experience, though. It's fine to do your own thing rather than making a direct copy, and it's an otherwise generally solid game.
Besides that, there's just that the designs and colors on the blocks are a bit too noisy and hard to parse when quickly surveying the whole board at a brief glance, and the sound effects could've done a bit more to convey what was going on, I suppose?