Gusha is a fun word with multiple meanings, but probably closest to "splat" in this context. In this game, you play a mouse trying to get pieces of cheese or other bait. When you collect three, you get a coil bomb to place on the playfield so you can blast an alien. 10 alien explosions gets you to the next stage.

This game exists on other platforms and it's always interesting to see what they do on the MZ-700, as it lacks a graphics mode.

It's another Hudson Soft title with nice artwork on the cassette cover.