Plays really well! And I really liked the music, for me it didn't feel repetitive, although I understand why one could say that. The graphic is simple, but neat and clean and suits the gameplay nicely. I agree with Kelvin about some disjoint between block visuals and buffs, but I also think it's perfectly fine for a game jam.
The last level felt much harder than the rest, but I liked the idea of incorporating every power and making it an ultimate challenge crowning the progression.
Also, we are not on speaking terms with the teleporter.