Hey, in my opinion maxing out the basic resources is most important. Then move onto upgrading drill and battery up until the very last upgrades and then instantly max out radar, all the while improving resources.

Exeloar's Purchase Route

Equipment Upgrades are formatted as [Column, Level](http://exeloar.github.io/diggy/Equipment Upgrade Example.png) Mineral upgrades are just Level

1. Copper [5]
2. Bones [5]
3. Drill [3,1] + Battery [2,5]
4. Silver [5]
5. Battery [3,5] + Gold [5](Just grind getting gold from here on)
6. Drill [4,4] + Battery [4,4]
7. Radar [5,1] (This costs 20000$ from [4,5] to [5,1])
8. Mushroom
9. End