I picked up a bulk lot of eight cartridges on Mercari a while back. Among the games were four titles by Habit Soft. They are somewhat simple but quite fun games. I'll expand on the gameplay and screenshots a bit in the future when each gets their own game introduction, but here is a brief overview of the games.

First, in order of release, is Tiny Dracula's Castle. It's a series of one-room dungeons. Collect all the treasure chests and get out without bumping into anything that will kill you.

Second is Burger Kitchen. Imagine the concept of Burger Time, with the mechanics of something resembling Tetris. I mean, it's not quite either of those, but that might give you some idea of how the game is played.

Yakitori Meijin Torigin (maybe it's Torigin? Or Toriumeki?) is a yakitori shop simulator. You have to serve the yakitori according to the customer's specifications.

Decayed Dungeons Gaiden is kind of a simple Legend of Zelda, but dungeons-only type of game. But the quick leveling up and item upgrades make it fun to play.