Did you change the difficulty of levels very deep ? They were basically impossible weeks ago, now I tried again and I'm completing levels, not too easily and I shall still use some tools sometime but it's much more possible now. Only issue could be that the price to destroy sandstone substance is high so I might have to farm red crystals, but actually I almost completed one level like that without those.

I constantly get stuck on the levels with stone between areas. Must of the playable stuff is on the other side and is very difficult to be able to blow up towards the needed area. Only down at 57 at the moment, so I can only imagine how hard it will be below that. Also, if anyone know how I can get spades and pickaxe faster please give me a hint, I have those at level 4 but have not found red crystals to upgrade further. Thank you.

Not sure which levels are more accessible now, because I feel some are outright impossible (e.g. those with wisps of smoke where there is absolutely no possibility to even have a 3 in a row, and the other areas are to narrow to have combos and get explosives). I'm around 130 deep and at this point to go one level lower it takes a lot of "farming" tools. And even that is harder and harder as the levels get more difficult not only as you go deeper, but also to the sides. So I have very few places to safely get tools.