Hello Sicave!
Thanks so much for sharing this nice feedback.
Good point regarding the lack of empty space. We designed the base levels with 2 player layout in mind, and you remark is spot on. We need to work on two separate sets so that 1P and 2P modes have a better feel.
Regarding the teleport, good point too. We've implemented that as a way to reduce the time waiting when the orb is stuck bouncing off walls / stuck in infinite loops. A spell / ability allows the orb to "stick" on the paddle, so there be a common ground we can use here. We first simply returned the orb in the inventory, but then the orb would loose all its buffs.
Last point is also more than valid. We're lagging behind in terms of soundtrack! Will work on that too, hopefully releasing a first in-game soundtrack in the next beta.
Cheers!