Added way more levels (and mechanics exclusive to those levels), roughly doubling the length of the game. These can be accessed the same place the ending was originally.
A few tweaks to existing levels
Completely different ending
Added more music (including one more piece in the existing levels)
Some graphical changes: better title screen, trees in the background, boxes now have a checkerboard pattern, border in full-screen mode, snails rotate now, level transitions look different, there's now a way-less-subtle animation when a snail tries to jump but can't
There's now a bit of coyote time
You can now reset a snail's position by walking past where they originally were
Fixed a bug where a snail would behave weirdly if you were standing on them when activating them