Thanks for sharing your experience with the game again :)
The pink slider controls the strength of the gravity affecting the player. The green slider controls the player's speed, but it's probably impossible to reach it in the current build the "intended way" due to a misplaced tile (it might be possible with the pink orb, but I personally haven't found a way yet).
The game is beatable (although the exit sprite doesn't render due to another bug). The orbs help you reach the exit, and unlocking the green slider is optional.
Again, thanks for taking your time and providing useful feedback! ^^