Oh Etho! I played this map for several hours, discovered pyramids, an abandoned mineshaft, a cementery, a volcano, ... it was nice to explore. I also got several laser guns from skelletons I killed, not sure if it was because of the version (I played the 1.8.3 version).
Anyway, you were so close and you didn't know. I bet you were like 1 or 2 shots from destroying that UFO (10 shots to kill it in total).
Anyway, cool but short series.
I hope you keep playing mods like this.