Minor tweaks, nukes

weapons.js

@@ -3,6 +3,8 @@ import {drawCircle} from './gfx.js';
 export const WEAPONS = [
   {id:'baby-missile', name:'Baby Missile', xr:5},
   {id:'missile', name:'Missile', xr:10},
+  {id:'baby-nuke', name:'Baby Nuke', xr:50},
+  {id:'nuke', name:'Nuke', xr:100},
 ];
 
 export function drawExplosion(ctx, x, y, r) {