TNT is broken because the blast radius is telling the block to find the distance from the nearest block to it (almost always 1 in this instance) instead it should be the inverse distance from the blast radius to get the effect you desire.

Can I use this to make a BedWars fan game?

What the

One block challenge

Ummmmm… i think i exploded the world

Wait, did the TnT just explode the ground?