Youtuber and musician Seth Everman improvised various musical sequence to simulate certain situations that occur in most games, such as when you meet a boss, go through a tutorial, watch an unskippable cutscene, and more!

From Seth Everman:

I just made this video by improvising some stuff that sounded like video game music and it’s honestly a terrible video but thank you so much for watching!

[Source: SethEverman on Youtube]