I'm wondering what factors play into the duration of the Super Drill activated by collecting Mana vials in Tiny Miners (the one by 'About Fun', not to be confused with 'Tiny Miner').
It seems the higher the level of the mine the lower overall the length of the Super Drill is, despite my Magic Skill constantly increasing.
Best Answer
Source: Tiny Miners: Tips, Hints and Strategies to Become the Best Digger
UPDATE: As mentioned in the comments below, the answer was not satisfactory.
However, the following does:
The last line of the shown pop-up indicates that each dungeon has "magic setting", which will affect the duration of your Super Drill.
Those "magic settings" can be found when selecting a mine and will show at the top. It says "Superdrill duration" with a total time and an indication of the time that has been added by your Magic Skill.
So you may be correct about the duration feeling lower and lower in each new mine due to higher mines having higher "magic settings".