collisions+ terraforming v0.05

this is farrrrrrrrrrrrr from perfect, let alone good for that matter XD . the main problem still is the sudden rearranging of the 'ground' can only displace the ball within the y plane, and thus this weird teleporting thing happens occasionally, or the 'invisible escalator' as i like to call it XD.

move the mouse around to change the 'ground' and press any key to reset the ball at the middle of the stage