Love the music and how it speeds up and slows down with the respective tiles. The voice overs can be a bit intrusive, but that’s somewhat charming too, reminds me of other games back in the day that would play out full voice clips regardless of context.
I think the difficulty is perhaps a bit high for a tech demo. I couldn’t reach the end and it might be overly tuned to your level of expertise after testing and playing it repeatedly. I also think that the “quantum” element doesn’t stick very well, in part because there are so few times you can safely use it. But there’s definitely potential there!
Overall, an impressive showing and especially so for something in 20kb.