Thank you very much!! That's great feedback, I will look into ways of avoiding getting stuck (like a crouch), or the placement of some of the balls.
For extra ammo, one tip I generally share (besides collecting the PO-RO-TO tiles for +15) is to try to play a bit more aggressively from level 2 onwards to take advantage of the combo bar - but of course that comes with a bit of risk too! May I ask in which level you ran out of ammo?