This one has a very sophisticated air strafing mechanic and the way this game has most levels(maybe all levels. I have only reached level 8) in a small space is a little Lack of fun and freedom for me.
The bigger level would be more appropriate for this type of game and maybe some shape corners rounded to prevent ball hitting the edge, because accuracy is Very Hard to master in this game.
But I admire the dedication on coming up with this idea.