Honestly, I just eyeball the geometry first—look for those perfect right angles or odd curves that don’t line up with the visible tiles. If a jump feels too “just so”, I’ll trace a line from the player’s start to the destination and check the slope; if it’s not a simple linear interpolation or a smooth Bezier, someone’s hiding an easter egg there. Then I fire up the level editor, snap a cursor to the spot, and check the hitbox data—if the invisible wall’s hitbox is slightly offset, that’s a giveaway that the path is meant to be found, not just coded. Basically, I overlay the math on top of the art and see if the numbers line up or if the designer is just throwing a random obstacle in for laughs. That’s how I sniff out the hidden tricks.