Collect the musical keys and use them to resonate the blocks and manipulate the levels. Use that to reach the sign to complete the level.
Resonance is a musical platform puzzle game originally created during the Global Game Jam in 2010 in the Netherlands, where it won both the audience award and the jury 1st prize. Move around with the arrow keys. Collect the musical keys and use 1, 2, 3 and 4 to play the notes (after collecting the right keys).