This game is awesome! I couldn't put it down. Though I couldn't quite figure out what to do when I got the gun. 

lol i thought of making a game like this for the jam but gave up the idea and instead made an easier light game. (my game was an atom trying to gain protons and convert into other elements)

Fun game and good interpretation of the theme, this might be a winner guys!

The game was a great idea, i liked the sound effects and the title screen was cool :). As for the criticism, I would say that the game had a little too much down time especially in the beginning and the mechanics were not intuitive enough to not warrant instructions. I liked the polish and the music was nice. Great work!

Good job!  It's interesting to have a game on "elements"  with this meaning , for once!