It looks a bit odd when the one crawler's beam phases right through the other crawler's body. Not sure if anything should be done about that, especially as friendly fire is a big design change, but it was something I noticed.
Otherwise, these look great, as usual.
Thanks. I was just thinking about that, actually. There is one instance of friendly fire in the game now -- these missile like things that chase you around, it's possible to lead them into enemies -- But I don't know where to draw the line or where it becomes "nonsensical" in terms of friendly fire, because I don't think across the board friendly fire is going to happen.
edit: actually.. maybe across the board friendly fire in terms of enemy bullets hitting eachother could happen. Hmm.