Moved into Extras in :
https://www.roblox.com/games/4635669637/Tunneler
Code is outdated in this experience. This game is solely just to showcase portal mechanics.
Controls
Left Click - Place Portal A
Right Click - Place Portal B
R - Clear Portals
CTRL - Crouch
Tab - Settings
If your game is laggy it might be a good idea to change some of the video settings by pressing TAB.