IMHO;
* You should be able to move the saucer.
* There should be enemy units that fight back (tanks, fighter jets etc).
* You shouldn't be able to aim the bombs or abductor ray - they should just fire directly downwards.
* Bombs are massively underpowered at present (although maybe when you add buildings & armored vehicles they will become useful?)
* The laser should be an actual beam, rather than just a rapid fire gun.
* Lightning should automatically hit the person nearest where you click.