I think I will play games!
little bit of games make tired person have energy!
But my mom doesn't belive it!
...Because I play games even I'm not really tired.
Anyway, if I played games but I'm still tired, I will take a nap!
I take a nap very rarely, but I think it is a nice way to get energy.

"Happy is the man who is always on guard.​" — Proverbs 28:14
= 
I think I will play games!
A little bit of gaming makes a tired person have more energy!
But my mom doesn't believe it!
...Because I play games even when I'm not really tired.
Anyway, if I play games but I'm still tired, I will take a nap!
I take a nap very rarely, but I think it is a nice way to get energy.
= You normally need a before “little bit” when using it as a noun phrase.
= Gaming is an uncountable noun referring to the activity. 
= When we're talking about a condition/time, so even when is appropriate. 
= This is amazing!