I guess I’ll recommend Colecovision games since most other systems are well spoken for, first the arcade ports that are fun
Pepper II, a fine pacman style game
Venture, a dungeon shooting game
Turbo, classic racing
Antarctic Adventure, another racing game, I like this version better than the MSX
Ones not arcade are
Pitstop, another racer
Smurfs, a decent breezy platformer
AE, a timed shooter similar to Galaxian but with the gimmick of ships exploding and chain reaction combos to increase score. Really hard, pressing fire launches the rocket and releasing it detonates. Striking an enemy ship before detonating will make the shot a “dud” adding needless difficulty at first.