While I enjoyed my time with the game and can't wait to see what's to come there are a few things that need to addressed. Unless I missed somewhere, there is nothing in the game that informs you that you can pick up and throw items. The only clue is from the puzzle that requires you do it. Now ordinarily this would be great time to tutorialize the interaction, but your just left to your own devices to figure it out. Continuing with puzzles, the reward moment should when you solve the puzzle, not 7 minutes later after you walked the key piece back through the level. The "Ah ha" moment gets replaced with "Finally, it's over". That can push players away from wanting finish the game.
All in all, it's still promising, and I want to play more.