Thanks! This idea did start as an analogue to Minesweeper; definitely considering expanding on Gold Trigger in future...!
The metal detector battery life bar on the left hand side of the screen was intended to be a kind of timer for how long you were allowed to hunt for gold before it ran down and the trade-off for double-clicking to move faster was to cut off the dust trail so players have less of an idea of where they'd been and where landmines could potentially be hiding.
Will definitely think about making movement speed faster overall though and some other possible considerations towards game balance 👍