[Internet Game] [2005-2010] a flash game where you're in space and have to go to different planets and beat your high score doing different sports.

Something along those lines, have a very vague memory of playing this 15/20 years ago while I was in school. I remember enjoying it. Pretty sure it had a name like "Solar Sports" or something like that. Similar to a game you'd find on newgrounds or miniclip back in the day.