Neptune
_Neptune_ is a side scrolling arcade game where the player controls a
submarine while destroying or avoiding underwater sea creatures.
The submarine can move in all 4 cardinal directions, while the ground and
monsters rapidly scroll by from the right. The submarine has an unlimited
number of laser shots which shoot out horizontally from the vessel, as well as
a limited number of bombs, which descend vertically. The are multiple levels,
and each level has several stages, including underground components and
differing enemies. The player receives 20 bombs per level. The player has
limited fuel, but will refuel at the end of each level. Enemy creatures
consist of various underwater creatures, including sharks, jellyfish, and
more. If the player hits a creature or the ground, they lose a life. The
player starts with 5 lives, and it’s game over when all lives are lost.