This was a really cool game! I enjoyed the concepts here, and could see where it could go from here.
A few player experience issues:
Something about the throw felt a little unnatural; perhaps it wasn't taking into account jump velocity? I'm not sure I can fully put it to words, but it was really close to great!
Having no lives felt a little unfair; it's really important to give the player an opportunity to learn a new mechanic through potential failures without sending them back to the beginning of the game.