Ok, I think its a good idea to reveal some information about the development of the game along with some secrets and lore of the game.
The first thing is a secret mode. By holding shift and pressing the title logo on the title screen takes you to the level in mode 0. In mode 0, you play as Joe (not one of the robot versions in the other modes, the real one). He doesn't have the ability to dash or wall jump, but he has a triple jump to make up for it. Beating the level with Joe will take you back to the title screen.