This has great polish. Like. Serious, professional-level polish. I slipped from my "reviewing a game jam game" mindset to my "playing a real game, for fun" mindset without ever really noticing. Good transitions, solid sound effects, and the ever-so-satisfying bleep of clearing a row managed absolutely hammed my dopamine receptors. Well done.
(I'd also like to shout out the fact that the blocks tell you how they form combos. Really fun aha moment, and the point at which the gameplay really clicked for me.)