Hmm... I want to play Mario kart with my friends!
I already have this game, but I think this is the best game nowdays!
I want to play it every day!!! YEAH!!!!!
You have to try the mario kart world some day!

"A true friend shows love at all times. — Proverbs 17:17

=

Hmm... I want to play Mario Kart with my friends!
I already have this game, but I think this is the best game nowadays!
I want to play it every day!!! YEAH!!!!!
You have to try Mario Kart World someday!
= The titles/proper nouns should be capitalized.

= someday = at an unspecified time in the future
some day = one particular day
= This is amazing!