Magical Shitty LaserFun facts about the laser:
1. You can only fire a shot once the previous shot has hit a wall, an enemy, or dissipated by traveling far enough in open space.
2. Shots can be fired continuously by holding the fire stick in one direction (but they will still follow the rules in Fun Fact #1).
3. You can fire shots over or under enemies. Just being in the same tile as an enemy does not guarantee a hit.
4. The laser is right-biased, something I have just figured out in the past couple of days.
Take a look at these two setups:
Common sense would dictate that these tactical scenarios, though mirrored, are equal. The enemies approach from the essentially the same direction (they must move up and then over to reach you) and the player has the same amount of time to react to enemies coming from the spawn point. However, these situations are far from equal. The picture on the left is a slaughterhouse for the enemies. You could park there all day, spam shots to the right, and you'll never die. The picture on the right is a death trap for our intrepid explorer. Ooooh...Intrepid. Lit?
For whatever reason, enemies can slip through shots fired to left even if the wall is only 1 tile away. This is extremely important if you find yourself in a tight situation and are hunkered down in an alcove where the enemies will approach you from the left. I died so many times while spamming in the long vertical corridor near the end of Stage 2 and it frustrated the hell out of me.
Perhaps this is a programming bug, or an unintentional side effect with how the objects are rendered/refreshed on the screen. The wall shot appears to only work when firing to the right so maybe the two are related.
The lesson here is that shots to the left must be carefully timed. Thank you magical shitty laser.