How are you with rhythm games?
Any laptop with basic graphics and CPU can handle
Osu!. It's quite addicting and has 4 different modes depending on your liking. First mode -which is the main one- is basically like this: (I think showing is easier than explaining)
The 3 other modes are:
Taiko: match your clicks with the beats that show on the screen.
osu!mania: use your keyboard as a.. 'beatboard', and match clicks on specific keys with specific beats that slide on the screen. Number of relevant keys on the keyboard increases as you increase the difficulty.
Catch the beat: just move your character left or right and gather the 'fruits' that represent the 'beats'. I personally never enjoyed this mode because it doesn't really resemble a rhythm game at all.
P.s. The design used on that video is not the original game design, if that matters at all

The game gives a huge room of freedom when it comes to that. You can even create your own themes and put them in their forums or keep them to yourself if you like. Just in case you were turned off by the design (since it looked ugly to be honest).
Anyway, this is one game I'd recommend to anyone with low system specs, because it's too good to be missed.