SUPER MARIO MAKER PROMPOSAL
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Super Mario Maker allows you to create custom levels for other players to try out that range in difficulty from walk in the park to rage-quitting impossible.
One YouTuber user Retro Shanerator used Super Mario Maker to make a special level in order to ask his wife to marry him. By carefully placing some blocks to spell out “Pam, will you marry me?”, he had himself a fiancée before she was able to jump up and get that finishing flag.
You can take a similar route, and use this cute idea to ask you SO to prom. You’ll just need to rephrase that whole “marry me” part or you might have an awkward conversation on your hands.