great. wish there were more classic levels and more upgrades. and the bounce/phase modes can be tossed. they add nothing to the game.
re: dev - no. the bounce/phase really add nothing to the game that players would care about. rather than considering them completely distinct game modes with separate upgrades/etc., you should have a way for the player to set modifiers and they could enable them there. some kind of creative mode. because those tiny changes that don't affect gameplay at all don't deserve to be distinct game modes. another modifier could be gravity.
some additional upgrade ideas:
-chance for expanded stuff to explode into projectiles when they die. call these projectiles "ghost balls" that can collide and blow stuff up but don't need to die to hit milestones for stars/completion (i.e. they can only help you)