Arrow keys or joystick for mobile for controls. Pressing the up arrow key and then letting it go while in air and again pressing the up arrow key lets the player to double jump. To wall jump first press the up arrow key along with the left or right arrow key whichever lets you to slide through the wall and then press the up arrow key to bounce the opposite direction. Collect checkpoints, apples(the biggest one is the bonus), keys to unlock doors. Jump on one type of enemy on its head to kill it. The other type of enemy cannot be killed by the player. Some platforms can be entered from underneath but not exited through underneath. They are lighter (in colour) than the main walls, floors and ceiling. There is also mobile controls to control the player as well. Good luck!!!
Do not click "play" directly - Just click the green flag and then click play to enjoy the game. Mobile Friendly. Have fun!!! New Feature adding soon: Multiplier Platformer