Great game idea!
I love the idea of using the different elements for puzzles. Reminds me on my veery first game jam game :D The game fits the theme perfectly, while it is a nice touch that you can keep moving but it depends on who you saved where to go next! I liked that a lot.
The game play feels good, however throwing of the elements could need some more polish as it kinda was difficult and frustrating at times in my opinion.
The SFX work quite well, but the game would profit if there is some music as well!
The art style is nice, I really like pixel art.Just consider using a more restrict color palette so everything feels like fitting together even more :)
Overall: Great entry!