The Earth receives a declaration of war from Planet X. The Earth sends Godzilla and Mothra on a journey through the solar system to stop Planet X's kaiju forces.
The gameplay is very repetitive. Basically, Godzilla and Mothra move right and smash everything in levels. Occasionally, you fight a boss.
The game supposedly has a save feature, but it rarely works, making you use a password most of the time.
Mothra has very weak attacks. Her only attack that seems to do any real damage costs energy to use.
Some enemies in level stay at the top of the screen where you can't hit them.
There is one projectile that mercilessly drains health. This projectile is arguably the number one cause of death in this game.
When you move through planets, the game recycles bosses from earlier and adds 1. This adds to the repetitive gameplay.
Instead of smashing cities, you're in space, smashing rocks.
Some of the bosses are obscure and never appeared in a movie with Godzilla.
Most notable example would be Gezora, the first boss you fight.
Some of the bosses are often very exploitable, or they can exploit you easily; both of these can often be considered unfair.
One example is where Gezora can pin you in the corner and keep stalling till the timer runs out.
Another example is where you can keep tail-whipping Moguera as Godzilla.
There is a time limit in bosses, but it doesn't show you how much time you have left. This can cause some annoyance with players close to beating a boss and all of sudden get sent back to the board screen.
Varan and Hedorah use a bad color palette. Varan appears to be purple and Hedorah appears to be green. Although Hedorah did have a few tints of washed-out green on his skin, Varan being purple is just ridiculous.
The music is awesome! Even songs that are really unfitting for the game, like the Password theme, are pretty good.
It is initially fun to move right and smash things as Godzilla, although the gameplay eventually tires out.
A surprisingly well-made creepypasta was made based on this game.
The boss battles are fun, even though they are repetitive.
It's cool to see Gezora in a Godzilla game.
The controls are simply easy.
When you kill enemies, you get health pickups that can fully restore your health.