Currently damage and health is set to 1 but it is easy to modify since everything is data driven and changing stat files is simple.
Adding randomness is something that might make the game bit more interesting. I will have to experiment with that.
The way different weapons are currently implemented was kind of quick and dirty solution since there was just one simple enemy type. With different enemies different weapons would become more useful. For example melee weapons would be interesting to try out.
I think I remember in Space Crusade heavy weapon units only moved 4 tiles and others moved 6. It might make sense also here. But have to make sure heavy weapons have enough firepower to make up for that loss of AP.
If you have ideas for specific enemy and weapon stats (AP, HP, damage etc.) feel free tell me and I can add them in.
Latest Linux version is available. I will check if I can do a browser version.