Cool!
The history of PC Genjin you provided was great. I keep forgetting about that arcade game, too. What were the tickets it dispensed all about?
Just a couple of minor grammar edits:
"The game tells the story of a young and cute primitive caveman,
whose is on a long journey to dethrone the demonic lizard king."
---Just change
whose to
who.
"His only weapon is his
big and bald head, he can either hit his opponents with a simple head-kick or jump in the air and dive down, head first, to smash them."
---I would change
big and bald head to
big bald head.
---The comma before "he" could either be replaced with a period, or you could insert a semi-colon there as well:
Examples:
- "His only weapon is his big bald head. He can either hit his opponents with a simple head-kick or jump in the air and dive down, head first, to smash them."
or
- "His only weapon is his big bald head; he can either hit his opponents with a simple head-kick or jump in the air and dive down, head first, to smash them."
or
- "His only weapon is his big bald head that can be used to either hit his opponents with a simple head-kick, or by jumping up in the air and then diving down, head first, to smash them."
Any one of those options should work. Hope I was more helpful than annoying.
Keep up the goodness!