I finally implemented your idea! :-)
RunToTheStairs got a new feature - the player may now dig tunnels!
For this purpose a new collectible item called "drill" was introduced which enables the player to remove one wall element by bumping into it.
The possibility of digging allows the player to take greater risks when taking alternative routes, since this will enable him to rescue himself by spending some resources (drills) if his route decision turns out to be wrong.
Please check out the commented High-Score-Table on the games itch.io-page! Meanwhile there are more than 25 entries in this table (5 of them by youtubers). So please consider to give RunToTheStairs a go and see how high you can climb on this table. ;-)