I love the game! It feels really good and the gameplay is fun! That being said, I felt I had to fight the player's movement a little bit (the player runs up walls, which can be annoying). The lack of checkpoints was a little frustrating, although easily manageable. I wish there was a click and drag toward where I wanted to go/throw, as I was often running out of space for my mouse. I love the trajectory lines, as they make lining up shots simple.
All in all, great game, great concept, could be a little bit better with a few small tweaks.