The art and music are awesome. I like the "preview" of the trajectory, nice touch! Agree with other's comment on having non-drag-and-drop controls available and gage visibility.
As per the comment, I couldn't really play the game because you die so quickly. A small note is that the font is very hard to read. Liked the sound effects!
I liked the thought that went into the sell vs purchase mechanism. You buy one at a time, but sell all at once. It would be cool to also be able to buy multiples.
Great game! Love the screaming sound hahaha. The shotgun being for movement rather than blowing up the balloon was not super intuitive. Font is a bit hard to read, but matches your theme.