Hey, @pikapichu14, welcome to the forums! Looks like you haven’t done anything with this topic for more than 24 hours, and (not to rush!) it would be great if you could answer some of your fellow forumers or mark the most helpful post as a solution.
In case you need more help:
In platformer mode, the only terrain that can be mined by default is dynamic terrain — that is, dynamic stone, dynamic sand, dynamic gold, etc. They can be damaged using any gadget, but a pickaxe is the best thing to use. The “rarer” the dynamic terrain, the more health it has, and the harder it is to break. Better pickaxe rarities do more damage as well, and can mine better ores.
Here’s a guide for making damageable props, other than dynamic terrain, that give you items!
How to make a mineable rock (Please Reply With more ideas) [WIP]
And if you need more help with your map, check out the minecraft and survival tags.