Player is falling trough ground.How to fix?

I found solution to my previous question.

Problem was in function “Is Trigger”.

When i enable that function,i fall trough ground.When i disable it i don’t fall but my player (ball) can’t collide with other objects.

I need “Is Trigger” function,because i want to make death.Player hits the collider and respawns.

I somehow fix it.

I have another problem.

I have coins in scene.Everything looks good,but when i load scene trough script,my coins are almost black.

It looks like light dont affect coins. Help