Added:

New Levels. (Now there are 30 total levels.)

Added Yellow Boss.

Added Yellow Enemy

Added Lab Drone Enemy.

Added Turrets.

Added Ice

Changed: Level order

Fixed:

Level 10 empty square glitch.

Invincibility glitch.

Impossible level glitch.

Fixed:

Sound Glitch on level 13

Load save glitch on the menu.

Added:

Enemies

More levels

Poison Gas

More save slots.

Added:

3 more levels coming after the boss.

Portals.

Moving objects, such as platforms, spikes and saws.

Added:

11 levels total.

A boss and 2 "other levels" at the end.

Crumbling, normal, key, and semi-solid/jump-through platforms.

Added liquids, such as water and/or goo.

Added Springs.

Added:

Simple Platforms.

The player.

Platforming and mechanics such as wall jumping.

Hazards.

First 3 levels.

Checkpoint and end flags.