Tunnel Mission

[jediaction]

JEDIACTION

This is a game like I Copter or Cave copter by DJKevy who makes awsome games on yoyogames, You fly with a little ball through a tunnel. Click and hold to go up, let go to go down. Please help me on this! You can go through the walls. How do you make it so when you touch the wall it says game over, because there is no game over. I know how to make it say it, i just need the collisions to work. Please help and comment