Do you keep the items you got in time attack when you beat the game and restart in the same game file like the health and stamina?

Yes.
If you beat the game with the time attacked unlocked weapons and items, and you save the game after you completed it, and start from that save again, it will play the game over again with all the unlocked weapons and items etc.

Just make sure you keep Normal mode and hard mode on 2 different files.
Because you can't use the weapons and items that you've unlocked in normal mode in hard mode and Vice Versa.

If you save over the normal mode file with a hard mode file, then you will lose all your weapons and items that you've have unlocked on Normal Mode, and same when saving over Hard with Normal.

That's annoying...
So if you play in normal mode, then want to try hard, you don't keep all your stuff. You have to keep wasting your time on an easy difficulty if you want to get better stuff, like stamina for the garden and all?

so how do you get stamina. do you get a little bit when killing every collosi:confused: