Hey, Mathcong. Good effort. Here's my quick take -
Mismatched pixel grid issue aside (that's a tough one) -
---Game is called "Slashy Ninja", which sounds pretty action-oriented and violent, but the title screen couldn't be more calm and tranquil, featuring a generic but solid mountain/sky horizon scene. [insert any Bob Ross quote]
I feel this title screen concept and the game's apparent concept clash. (Based on the name I'd guess it's a bloody Ninja Gaiden-like platformer.)
---I think title screens are super important. Gotta be good. Especially the game's title text.
Think of your game's title screen like a book cover - What do you assume about a book if even the cover is boring and unappealing?
A book cover's job is to grab attention and make you want to open it. For small indy games, the title screen often doubles as the primary key marketing/promotional art.
---Here's a super fast edit mainly addressing foreground/background separation:

I'll let it speak for itself, might give you a few ideaz.
Definitely do animate it. I love the bandana blowing in the wind.