Great game! Didn't even know these kind of games were possible to make in Scratch I've only messed around in it a few times and was never able to create anything nearly as impressive as you have. The visuals were great and the screen effect whenever you broke those pipe/walls was really cool. I also think this is one of the best if not the best implementation of the theme. However the special object does feel like it was put in just to have it not really for a good reason but sure thats understandable it was a weird special object for sure.
Music/Sound Effects were great and I love that you went through and recorded your voice for the presenter that was a great touch and it really made the game.
I will say that the game is buggy and glitchy but thats probaly more Scratch's fault than it is yours. Overall a very good solid game.