What is jump? [Prototype/Learning]

A short game where you can change gravity instead jump.

What is this?
Power count (at top right) = Available count that can be used to change gravity while floating in mid-air.
Blue orb = Gives power/adds power by one
Yellow orb = Finish/Next Level

Controls:
A/D or Arrow Left/Right = Left and right movement 
Space = Change gravity

Note: It's just small, short version of what I learned.
50% of Youtube tutorial, 50% discovered by myself.