So far, it has:
Course Editor! Make your own levels, and beat them as fast as possible!
Objects include:
■ Solid Tile
∆ Spike
S Start Pos
F Finish
O Coin (subtracts 1 second from your time)
Z Spring
^ or V Gravity Flip
Empty
Save and Load! Save up to 3 levels at a time, so you can keep on building!
B+Down while in editor
Resume resumes the course
Slot: x selects slot you would like to do an action to
Save to Slot saves current course to the slot you chose
Load Slot loads the slot you chose
New Course starts a new course (duh!)
I'll add more features in future updates, but so far, I think it's pretty good!