The game is monochrome, except for the enemies' bullets.
After shooting the cannons, the true face of the boss appears!
Defeated the first boss. If you continue to shoot at the boss you get a shield powerup, like in the pictures!
Second stage. The squids are back, moving these large asteroid looking blocks...
Since the squids move upwards, it's a good thing to have the backwards firing weapon here!
This game seems to have an obsession with eyes!
Attacking the second boss!
Second form of the second boss
Third stage. Just got the 'wide' weapon!
Better move away from there quickly...
Many enemies move in formations like this.
These blocks can be removed by shooting at them.
Checkpoint! So you don't have to play the entire stage again!
Approaching the third boss.
Fighting against the third boss.
See the glasses? It's a cameo by Jack from Cave Story!
The squids are getting tougher...
The fourth boss moves up and down, with rotating 'arms'.