Cool concept! Some notes:
- Level select menu doesn't scroll with the mouse when a level is focused. Only works when nothing is in focus.
- Spacebar/click to switch speed doesn't seem to work all the time
- Body sometimes gives up on following core if it's off-screen (this kept happening to me in The Tower)
- KB/Mouse controls are a bit confusing. The control screen lists keyboard and mouse separately, so it seemed like the game could be played with just the mouse, but I realized later that you can use WASD to move without having the body follow you, which is necessary at times.
I didn't try out the level editor, but I like what I've seen so far. The slime physics are fun and surprisingly not buggy — the body always found a way to un-glitch itself when trapped inside a door, etc. Hope to see more hijinks with the logic switches, because there's a lot of room for complicated puzzles there.