number facts is a bullet-hell platformer game where you learn about numbers. this game is not recommended for education, as many of the facts are completely apocryphal.
number facts has multiple modes. the current ones are classic, endless, and snake, which can be accessed with c, e, and n respectively. each of these modes also has a "hard mode" variant that makes it nearly impossible. hard mode can be toggled with h.
this game is on itch.io here.
everything on this site is freely available under CC0 1.0 Universal.