Battle Unit Zeoth

The Good
The gameplay is good. It's a bit of a cross-between a run-and-gun and a SHMUP, but not so bad to be a bullet-hell. You can fire in all four directions. The music is top-notch for the Gameboy.

The Bad
There's only five levels. No battery back-up to retain tops scores.

The Bottom Line
While there's only five levels, the gameplay and music are enjoyable. The scoreboard and power-ups are retained after beating the final boss, so there's some incentive to see how many times you can cycle through to rack up a top score.