Thank you for your feedback! I’m sorry to hear you had performance issues. I developed the game on a fairly old computer where I consistently got 60 FPS, so I assumed it would run well enough for most players.
I’ll make a note about enhancing the feedback when the player absorbs the cubes. I did have a sound effect, but I felt it interfered with the song, so I removed it. I’ll see what I can do visually instead. :)