Not sure if I didn't make it far enough or something but I didn't notice anything changing size. Also, in my opinion, there are way too many enemies that spawn since you get cornered by all of them coming from each side simultaneously. The movement is a bit wierd since when you let go you hurl in the direction you let go in causing you to sometimes run directly into the boss or enemies. Also, for me, sometimes the boss becomes invincible when shooting fast at it. The game looks pretty good though, I did like the style.