gamedev
I've changed the ocean tiles for the alien planet tileset from red to yellowish green (trying to make it look like some kind of acid) because the bullets and the player's crosshair blended in with the red oceans. I originally wanted to make the oceans yellow (color of sulfuric acid which could be an alternative to water for alien life forms) but the yellow oceans would've looked too similar to the sand tiles.
gamedev
I'm still trying to replace all copyright infringing placeholders with either free to use assets or art that I created myself. The boss sprite right here is my own creation. It's original sprite was ripped from some NES game (forgot the name). The water and lava tiles are still from Phantasy Star I though.