As someone who also did something akin to sliding puzzles, I enjoyed this a ton! x] Neat work on the sound effects and the music! The mechanic of going into a cave gave me a "Doctor Who Tardis" moment xD. Very charming game!
I will say, I was honestly wondering if you'd make a puzzle about intentionally going into a walrus projectile and spent a bunch of time looking at every stage if it would happen xD.