I'm doing something at my library where I turn an old PC into an offline game machine. Does anyone have suggestions for itch.io (or anything else nonDRM) games I can add?

Here's a few condtitions

• must be child appropriate
• shouldn't be CPU intensive since it's an old PC
• should be a game that can be played in a short credit (think arcade genre or comparable)
• nothing that requires the use of save data for like story or RPG progression. (but high scores are fine)

itch has alot of good stuff, but I wanted to see what other folks would suggest, since I'd probably fill the machine with puzzle, fighting and shmup games if left to my own devices