To put into basic English: This game is FREAKING COOL!
First off, the idea is just brilliant - With these two weapons you can chain yourself together with the world and even manipulate it in order to solve the puzzles. I can see that other weapons (or maybe should I call them tools?) could be invented as well that can do distinct things.
Second, the art, aesthetics, and the general feel of the game is my personal favorite! I'm really passionate about dark and gory visuals, and to top it off, everything on the game including the font twitchings, complement really well to a horror ambience.
The puzzles are really challenging as well, took me quite some time to get to the end, but it was overall a fun experience! It is incredible that you managed to fit in many puzzle features such as the bubble in such a short period of time and manage to deliver all of these well-rounded levels! Noticed a few bugs here and there (like in some levels you could pull the block with the harpoon down and you'll slide to the left and fall into a hole), but they are really minor and can easily be ignored with just a simple restart.
And finally, the music is really simple but it complements so well to the game's atmosphere. Wonderful job! This was by far one of my favorite games in the jam! Maybe you could even turn this into a full game, like Baba Is You! Going to my top 20 favorites list!