Added a flying saucer enemy to Captain Ace:
Unlike the other enemies in the game, who fire directly downward, this one fires directly at the player, forcing them to constantly be dodging. At least, it fires as close to the player as it can using trig with integers.
I was thinking the next enemy would be a missile that comes straight down fast. If the player shoots the missile, it explodes and can take out enemy ships. However, if it gets to the bottom, it explodes with the very real possibility of killing the player in the process.