Any key will make you jump! You can go on blocks with black lines covering them. Spikes and and running into a block will kill you. Portals activate on hit and change gravity. Pads activate on hit and will make you automatically do a jump of various sizes or occasionally change gravity both of which correspond to colour. Orbs activate on hit + jump at the same time, and act the same as pads, only airborne.
GD from Wish in Scratch. Ground physics by @Griffpatch. Uses Pen Text Engine