My excuse to put a project in the Story Platformers studio. ^_^ The instructions you are seeking are in the game. STORY: Rightie went into the Portal of Mirrors while hiking, and now Rightie is stuck in an alternate dimension! Thankfully, Leftie can still sense Rightie... somehow...
Cobraguy for platforming code. Everything else is mine. April 30 2018: Added in-game story for @Bidulule. April 29 2018: Released